JPH1027011A - Programmable controller - Google Patents

Abstract

(57) [Problem] To provide a programmable controller capable of performing data processing in various numerical formats without increasing an error. SOLUTION: When a data format assigned by a data format assigning unit 2 is an integer format, an arithmetic processing unit 4 of a programmable controller 1 directly accesses the data, extracts the data as it is, and integrates the integer format data. When the data is accessed as a physical quantity, a unit physical quantity corresponding to the data is extracted from the unit for assigning physical quantity 3, and the data is extracted by multiplying the data by the unit physical quantity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a programmable controller, and more particularly, to a programmable controller which is suitably applied to a case where a physical quantity input from a process is calculated by a program and output to the process.

[0002]

2. Description of the Related Art Conventional programmable controllers are:
When calculating a physical quantity input from a process, the input data is converted into a normalized integer and the calculation is performed.

For example, a conventional programmable controller converts a physical quantity input from a process into data of a normalized integer format by a process input / output device PIO, and performs an operation by a CPU using the converted data of the normalized integer format. Then, the data in the normalized integer format was output by the PIO.

For this reason, the data memory 25 of the programmable controller shown in FIG. 9 stores operation data 25a, input data 25b and output data 25c as normalized integers.

Here, the normalized integer is defined as a range in which the minimum value of the control range of the physical quantity of the process to be controlled by the programmable controller is 0% and the maximum value is 100%, which can be expressed as a 16-bit integer value. -3276
This corresponds to 0 to 10000 of 8 to +32767. This is called a “normalized integer” because the physical quantity is normalized to 100% and interpreted as an integer value of 10000 to 100.00%.

Therefore, for a 16-bit integer value, -32
7.68% to + 327.67% can be expressed. As described above, the normalized integer hides the physical quantity by normalizing the physical quantity to 100%, and expresses the percentage of the control range by the integer value. Therefore, the plant operator who is the user of the programmable controller can read the physical quantity. It is intuitive and easy to understand without having to be aware of it.

[0007] Some sensors and actuators input and output by the programmable controller do not operate a physical quantity essentially like an electromagnetic valve, but rather operate the valve opening degree as a percentage (%). ,
It may be more appropriate to use normalized integers.

Further, in general, a floating point numerical operation is required to express a physical quantity, whereas in the case of a normalized integer, a programmable controller need only have an integer operation device, and a simple and inexpensive programmable controller can be used. There is an advantage that it can be realized.

FIG. 10 is a diagram showing an addition operation by a conventional programmable controller. In FIG.
The adder 65 performs addition of the input data 61 and the input data 63 and outputs the result as output data 69. The converters 66 and 68 perform scale conversion of a normalized integer.
And an adder 67 for performing addition.

When the length measurement signal is supplied from the sensor to the programmable controller, PIO is set to 0.
It is converted to a normalized integer of 0 to 10000 for a scale of% to 100%, and stored as input data 25b in the data memory 25 of FIG.

For example, in the case where the input data 61 in FIG. 10 corresponds to process data having a scale of 0 to 10 mm and the input data 63 corresponds to process data having a scale of 0 to 20 mm, When adding these two input data 61 and 63, the input data 61 is input from the data memory 25 of FIG.

Then, the input data 61 is multiplied by the conversion constant 62 by the converter 66 to adjust the scale of the input data 61 to the scale of the input data 63. Here, the conversion constant 62 is set to 1/2, and the scale of the input data 61 is set to 0 to 20 mm. As a result, the input data 61
Is converted to a normalized integer from 0 to 5000 indicating a range from 0% to 50% on a scale from 0 to 20 m.

After that, the output data of the converter 66 and the input data 63 are added by an adder 67. As a result, 0
0 to indicate a range of 0% to 150% on a scale of
A normalized integer of 15000 is obtained. And the adder 6
7 is input to a converter 68, and a conversion constant 6
Multiply by four.

Here, the conversion constant 64 is set to 2/3, and the output data from the adder 67 is converted to a normalized integer of 0 to 10000 indicating a range of 0% to 100% on a scale of 0 to 30 m. , And output data 69 are obtained. This output data 69 is stored in the data memory 25 of FIG.

As described above, the conventional programmable controller prepares the conversion constants 62 and 64 for the scale conversion when performing the addition operation as shown in FIG. 10, and normalizes the data handled by the operation block and the PIO. The operation was performed after converting to an integer.

In this conventional programmable controller, according to Japanese Patent Application No. Hei 7-324481, a full scale value and a base scale value indicating a range in which a physical quantity represented by data is to be calculated are stored in association with the data. And
2. Description of the Related Art A programmable controller has been proposed in which data is calculated based on stored full scale values and base scale values.

FIG. 11 is a diagram showing a structure of attribute data specified corresponding to data by the programmable controller of the prior application. In FIG. 11, attribute data 15b
Has a base scale value 38 and a full scale value 39. Here, the base scale value 38 is a value indicating 0% of the range in which the physical quantity of the process is calculated.
The full scale value 39 is a value indicating 100% of the range in which the physical quantity of the process is calculated.

The base scale value 38 and the full scale value 39 are represented in a real number format. The real number format is
A physical quantity can be expressed including a small number, and it is a digital data format that has sufficient precision in terms of control precision.It is expressed in a fixed-point format and a moving amount of a decimal point, or consists of a mantissa and an exponent. It is common to represent in floating point format.

FIG. 12 is a diagram showing an example of performing an addition operation using the attribute data 15b of FIG. In FIG. 12, an addition calculator 75 includes input data 71 and input data 7.
3 and output as output data 80, real number converters 76 and 77 for converting normalized integer data to real number data, an integer converter 79 for converting real number data to normalized integer data, and a real number An adder 78 for adding data is provided. The input data 71 and 73 and the output data 80 have attribute data 72, 74 and 81, respectively. The base scale value and full scale value of the attribute data 72 are set to 0 and 10, respectively. The full scale value is set to 0, 20;
The base scale value and the full scale value of the attribute data 81 are set to 0 and 30.

Then, the input data 7 whose scale is expressed by a normalized integer of 0 to 10000 with respect to 0 to 10 mm
When adding 1 and the input data 73 expressed by a normalized integer of 0 to 10000 with respect to a scale of 0 to 20 mm, the real number converters 76 and 77 cause the attribute data 72 and 74 to be added.
Is used to convert the input data 71, 73 into real numbers.

For example, when the input data 71 is a normalized integer of 10000, the base scale value and the full scale value of the attribute data 72 are 0 and 10, respectively.
If the input data 42 is converted to a real number 10 and the input data 42 is a normalized integer of 10000, the base scale value and the full scale value of the attribute data 44 are 0 and 20, respectively.
Converted to real number 20.

Next, the real number data converted by the real number converters 76 and 77 is supplied to an adder 78 for addition. The addition result is real number data having a scale of 0 to 30 mm. This real number data is supplied to the integer converter 79, and the scale of the output data 80 is 0 to 1 with respect to 0 to 30 mm.
Convert to a normalized integer of 0000.

As described above, according to the programmable controller of the prior application, the base scale value 38 and the full scale value 3 of the attribute data 15b specified corresponding to the data.
Since the operation can be performed by using a real number using 9, the programmer does not need to be conscious of the scale.

According to Japanese Patent Application No. 7-324481, a data format in which a data numerical format is set is stored in association with the data, and the data numerical format is converted based on the data format. A programmable controller has been proposed.

FIG. 13 is a diagram showing a configuration of attribute data in which a data format by the programmable controller of the prior application is specified in correspondence with data. In FIG. 13, the attribute data 15b includes a data format 35 in which a numerical format of data is set in addition to a base scale value 38 and a full scale value 39 indicating 0% and 100% of a range in which a physical quantity represented by the data is to be calculated. Have.

The data format 35 includes a normalized integer format 35a and a real format 35b, as shown in FIG. FIG. 15 is a diagram illustrating an example of performing an addition operation using the attribute data 15b in FIG.

In FIG. 15, an adder 95 adds an input data 91 and an input data 93 and outputs the result as output data 100. An input format converter 96 for converting the data format of the input data, 97, an output format converter 99 for converting the data format of the output data and an adder 98 for adding real number data.

Here, when the data format indicated by the attribute data 35 is the normalized integer format 35a, the input format converters 96 and 97 convert the input data into a real number format 35b and output it. If the data format shown is the real number format 35b, the input data is output as it is.

The output format converter 99 converts the data format indicated by the attribute data 35 into a normalized integer format 35a.
, The input data is converted into the normalized integer format 35a and output. If the data format indicated by the attribute data 35 is the real number format 35b, the input data is output as it is.

Input data 91 and 93, output data 100
Has attribute data 92, 94, and 101, respectively. The base scale value 38 and the full scale value 39 of the attribute data 92 are set to 0 and 10, the data format is set to the normalized integer format 35a. The base scale value 38 and the full scale value 39 are set to 0 and 20, the data format is set to the real number format 35b, and the base scale value 38 and the full scale value 39 of the attribute data 101 are set to 0 and 30. The data format is set to the normalized integer format 35a.

The adder 95 calculates that the scale is 0.
Normalized integer format 3 from 0 to 10000 for 10 mm
The input data 91 represented by 5a and the scale of 0 to 2
0mm to 10000 normalized integer format 35a for 0mm
When adding the input data 93 represented by the formula (1), the input format converters 96 and 97 use the attribute data 92 and 94 to convert the data into real number format 35b data.

For example, when the input data 91 is in the normalized integer format 35a of 10000, since the base scale value and the full scale value of the attribute data 92 are 0 and 10, respectively, they are converted to the real number 10.

Next, the real number data converted by the input format converter 96 and the input data 93 are supplied to an adder 98 for addition. Addition result, scale is 0-30m
m real number data. The real number data is supplied to the output format converter 99. In this case, since the attribute data 101 indicating the normalized integer format 35a is supplied as the data format of the output data 100 to the output format converter 99, the real number data supplied from the adder 98 is scaled from 0 to 30 mm. Is converted to a normalized integer of 0 to 10,000.

As described above, according to the programmable controller of the prior application, by providing format data representing the numerical format of data in association with the data, a plurality of operations such as addition and multiplication can be continuously performed as real data. Therefore, the number of data format conversions can be reduced, and the speed of the arithmetic processing can be increased. In addition, in the normalized integer format 35a or the real number format 35a
It is possible to specify whether the data is b or not, and even when data in the normalized integer format 35a and data in the real number format 35b are mixed, the operation on the data can be performed without error.

[0035]

However, in the above-mentioned programmable controller, the normalized integer format 3
When data conversion is performed between the data of 5a and the data of the real number format 35b, an error may occur due to the data conversion.

That is, when an analog quantity of about 12 bits normally handled by a programmable controller is calculated in a 16-bit normalized integer format 35a or a 32-bit real format 35b, an error hardly matters, but data representing a discrete quantity is calculated. When an arithmetic operation is performed by converting to a real number, an error may occur to lower the operation accuracy, and as a result, the control accuracy of the programmable controller may decrease.

For example, in a process in which a continuous object such as paper is cut into a fixed length while being wound by a roller, when the total length of the paper is measured by a rotation pulse counter of the roller, the count value of the rotation pulse counter is immediately converted to a real number. The count value is multiplied by the length of the paper per pulse of the rotation pulse counter to determine the length of the wound paper, and the length of the wound paper reaches a certain length. At that point, the paper is cut, and the total length of the paper calculated by integrating the lengths of the cut fixed-length paper is calculated by integrating the count value of the rotation pulse counter as an integer for all paper lengths, The error is larger than the total length of the paper calculated by multiplying the integrated count value by the length of the paper per pulse of the rotation pulse counter.

Further, in the process of packing a fixed weight while continuously transporting the same parts, when measuring the total weight of the transported parts by the number of arrived parts, the number of arrived parts is measured. Immediately convert to a real number, multiply the number of arriving parts by the unit weight of the parts to obtain the weight of the arriving parts, and pack the parts when the weight of the arriving parts reaches a certain weight. The total weight of the parts calculated by integrating the packed weight is the total number of parts conveyed, and the total number of parts calculated by multiplying the total number of parts by the unit weight of the parts. The error is larger than the total weight.

An object of the present invention is to provide a programmable controller capable of performing data processing in various numerical formats without increasing an error.

[0040]

According to the present invention, there is provided, in accordance with the present invention, a data format providing means for providing a data format including an integer format to data, and a unit physical quantity represented by one digit of the data. And a calculation processing means for performing calculation processing based on the data format and the unit physical quantity.

Then, based on this data format, it is possible to perform data conversion or not to perform data conversion. Therefore, when integrating data in integer format, the data is taken out in integer format. By performing the integration, occurrence of an error due to data conversion can be suppressed. Further, since a unit physical quantity represented by one digit of data is assigned, data can be easily extracted as a physical quantity.

[0042]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a programmable controller according to one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a schematic functional configuration of a programmable controller according to one embodiment of the present invention. In FIG. 1, a programmable controller 1 includes a data format assigning unit 2 for assigning a data format including an integer format to data, a unit physical quantity assigning unit 3 for assigning a unit physical quantity represented by one digit of data, and a data format and a unit physical quantity. And an arithmetic processing means 4 for performing arithmetic processing.

Here, the data format indicates whether the data is represented in a normalized integer format, a real number format, an integer format, or the like. The unit physical quantity is expressed in a floating point format or a decimal format.

The arithmetic processing means 4 comprises a data format providing means 2
In the case where the data format given by is an integer format, the data can be directly accessed, the data can be taken out as it is, and the integer format data can be integrated, and the occurrence of errors due to data conversion can be suppressed. When data is accessed as a physical quantity, a unit physical quantity corresponding to the data is taken out from the unit physical quantity giving means 3, and the data is multiplied by the unit physical quantity and taken out, so that the data can be easily taken out as a physical quantity. .

Next, a specific configuration of the programmable controller according to one embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a block diagram showing a schematic configuration of a programmable controller according to one embodiment of the present invention.

In FIG. 2, input / output means 11 for inputting / outputting data from outside, and communication means 1 for communicating with the outside.
2. Program means 13 for creating a program, program storage means 14 for storing a program, data 1
A data storage means 15 for storing attribute data 15b of the data 15a and an arithmetic means 16 for performing an operation based on the program, and a monitoring operation means 17 for performing a system monitoring operation are connected via a data bus 18. Have been.

As shown in FIG. 5, the attribute data 15b includes a base scale value 38 and a full scale value 39 indicating 0% and 100% of the range of the physical quantity represented by the data 15a to be calculated. It comprises a unit physical quantity 34 represented by one digit of 15a and a data format 35 representing data 15a.

The data format 35 comprises a normalized integer format 35a, a real format 35b, an integer format 35c, and the like, as shown in FIG. Data 15a and attribute data 15b
Are supplied from the input / output unit 11, the communication unit 12, or the program unit 13 and stored in the data storage unit 15. Then, the data 15a and the attribute data 15b stored in the data storage unit 15 are supplied to the calculation unit 16 according to the program stored in the program storage unit 14, and the data 15a is calculated based on the attribute data 15b.

For example, the calculating means 16 has a data format 35
, The data 15a is converted to a real number format 35b to perform an operation, or the data 15a is converted to a normalized integer format 35a.
And output the data 15a in the integer format 35c.
Is extracted as it is and integrated, or the data 15a in the integer format 35c is converted into a physical quantity based on the unit physical quantity 34.

Next, a system configuration of a programmable controller according to an embodiment of the present invention will be described with reference to the drawings. The programmable controller according to this embodiment has a base scale value 38 indicating 0% and 100% of the range in which the physical quantity represented by the data 15a is to be calculated.
And a full scale value 39, a unit physical quantity 34 represented by one digit of data, and a data format 35 representing a numerical format representing data are stored in correspondence with the data 15a.

In FIG. 3, the programmable controller comprises a program loader 21, a loader interface 2
2. CPU (Central Processing Control Unit) 23, program memory 24, data memory 25, network interface 26, monitoring operation unit 28, PIO interface 3
1, a PIO 32, etc., and a loader interface 22, a CPU (Central Processing Control Unit) 23, a program memory 24, a data memory 25, a network interface 26, a monitoring operation unit 28, and a PIO interface 31 are connected by a bus 33. .

Here, the program loader 21 performs programming, and monitors and sets programs and data. The CPU 23 reads an instruction from the program memory 24, and reads the data memory 2 according to the read instruction.
5 is read, an operation is performed on the read data, and the operation result is stored in the data memory 25.

The network interface 26 is connected to a network 27 and communicates with another external programmable controller. The monitoring operation unit 28 includes a display unit 29 and a setting unit 30, and performs display and setting for monitoring operation of a system including a programmable controller. The PIO 32 stores data input from the outside in the data memory 25, and outputs the data in the data memory 25 to the outside.

The data memory 25 includes, as shown in FIG.
Operation data 25a, input data 25b and output data 25c are stored as data 15a in FIG. 2, and operation attribute data 25d, input attribute data 25e and output attribute data 25f are stored as attribute data 15b in FIG. . Operation attribute data 25d, input attribute data 25
e, attribute data 15b such as output attribute data 25f,
As shown in FIG. 5, a base scale value 38 and a full scale value 39 are provided. The base scale value 38 is a value indicating 0% of the range in which the physical quantity of the process is calculated, and the full scale value 39 is a value indicating 100% of the range in which the physical quantity of the process is calculated. The operation attribute data 25d, the input attribute data 25e, and the output attribute data 25f have a unit physical quantity 34 represented by one digit of the data 15a and a data format 35 in which a numerical format of the data 15a is set. As shown in FIG. 6, the data format 35 includes a normalized integer format 35a, a real number format 35b, and an integer format 35c.

In this case, the PIO 32 stores the input data 25b supplied from the outside in the data memory 25 via the PIO interface 31, and outputs the output data 25c stored in the data memory 25 to the PIO interface 31.
Output to the outside via.

The CPU 23 stores the operation data 25a as the result of the operation in the data memory 25 or reads out the operation data 25a from the data memory 25. Also, the network 27 transmits the input data 25b supplied from another programmable controller to the network interface 2
6, and stored in the data memory 25, and the data memory 2
5 is output to the outside via the network interface 26.

The program loader 21 and the monitoring operation unit 28 display and set the input data 25b and the output data 25c. Next, a setting operation of the programmable controller according to one embodiment of the present invention will be described.

When the programmer designs a program, the base scale value 38 and the full scale value 3 shown in FIG.
9 is set together with the address of the data 15a. The set base scale value 38 and full scale value 39 are supplied to the programmable controller by the program loader 21 in FIG. 3 together with the program, and stored in the program memory 24 or the data memory 25.

When designing the program, the programmer sets the base physical value 34 and the data format 35 of the data 15a together with the setting of the base scale value 38 and the full scale value 39 in FIG. The set unit physical quantity 34 and data format 35 are supplied to the programmable controller by the program loader 21 in FIG. 3 together with the program, and stored in the program memory 24 or the data memory 25.

In the above embodiment, the case where the base scale value 38, the full scale value 39, the unit physical quantity 34, and the data format 35 set by the programmer are supplied to the programmable controller by the program loader 21 has been described. Supplies the base scale value 38, the full scale value 39, the unit physical quantity 34, and the data format 35 received to the data memory 25 via the PIO interface 31, and outputs the base scale value 38, the full scale value 39, the unit physical quantity 34, and the data format. 35 may be stored in the data memory 25 in association with the data 15a.

When transferring the data 15a to another programmable controller connected to the network 27, the base scale value 38, the full scale value 39, the unit physical quantity 34, and the data format 35 are transferred together with the data 15a.
And the base scale value 38, the full scale value 39, the unit physical quantity 34, and the data format 35 of another programmable controller may be set.

Further, the base scale value 38, the full scale value 39, the unit physical quantity 34, and the data format 35 are changed by the monitoring operation unit 28, and the changed base scale value 38, the full scale value 39, the unit physical quantity 34, and the data The format 35 may be stored in the data memory 25.

Next, an example in which the conversion operation of the programmable controller according to one embodiment of the present invention is performed by the CPU 23 will be described. 3, the input data 25b and the input attribute data 25 stored in the data memory 25 are shown.
The base scale value 38, full scale value 39, unit physical quantity 34, and data format 35 of e are supplied to the CPU 23 according to a program from the program memory 24.

The CPU 23 refers to the data format 35 of the input data 25b and converts the input data 25b into the normalized integer format 3
5a, the input data 25b is converted into real number data based on the base scale value 38 and the full scale value 39, and then the calculation is performed based on the real number data obtained by the conversion. The input data 25b indicating the physical quantity in the normalized integer format 35a is converted into data in the integer format 35c by using the 38, the full scale value 39, and the unit physical quantity 34, and stored in the data memory 25.

Here, the real number data after the calculation by the CPU 23 is the base scale value 3 when the data format 35 of the output data 25c indicates the normalized integer format 35a.
8 and normalized integer form 3 based on full scale value 39
5a, and the converted data in the normalized integer format 35a is stored in the data memory 25.
The output data 25c stored in the data memory 25
Is output to the outside by the PIO 32 via the PIO interface 31. Data format 3 of output data 25c
When 5 indicates the real number format 35b, the real number data after the calculation is performed by the CPU 23 is output as it is.

In the case where the input data 25b is expressed in the real number format 35b, an operation is performed using the input data 25b as it is, or by using the unit physical quantity 34,
The input data 25b indicating the physical quantity 35b in the real number format is converted into data in the integer format 35c and stored in the data memory 25.

When the input data 25b is expressed in the integer format 35c and the input data 25b is directly accessed, the input data 25b is taken out as it is and the operation is performed, and the input data 25b is expressed in the integer format 35c. When the input data 25b is extracted as a physical quantity, the input data 25b in the integer format 35c is converted into a physical quantity in the real format 35b using the unit physical quantity 34, or the full scale value 39, the base scale value 38, and the unit physical quantity 34 are used. Is used to convert the input data 25b in the integer format 35c into physical quantities in the normalized integer format 35a. The physical quantity in the real number format 35b and the physical quantity in the normalized integer format 35a obtained by this conversion are stored in the data memory 25.

Next, an example in which the conversion operation of the programmable controller according to one embodiment of the present invention is performed by the PIO 32 will be described. 3, the PIO 32 reads the input data 25b and the base scale value 38, the full scale value 39, the unit physical quantity 34, and the data format 35 of the input attribute data 25e stored in the data memory 25 via the PIO interface 31. And input data 25
b, when the input data 25b is expressed in the normalized integer format 35a, the input data 25b is converted into real number data based on the base scale value 38 and the full scale value 39, and obtained by the conversion. The supplied real number data is supplied to the CPU 23 or the base scale value 3
8. By using the full scale value 39 and the unit physical quantity 34, the input data 25b indicating the physical quantity in the normalized integer format 35a is converted into the data in the integer format 35c and output.

When the input data 25b is expressed in the real number format 35b, the input data 25b is
3, the input data 25b indicating the physical quantity in the real number format 35b is converted into the data in the integer format 35c and output by using the unit physical quantity 34.

When the input data 25b is expressed in the integer format 35c and the input data 25b is directly accessed, the input data 25b is directly supplied to the CPU 23, or the input data 25b is expressed in the integer format 35c. Further, when extracting the input data 25b as a physical quantity, the input data 25b in the integer format 35c is converted into a physical quantity in the real format 35b using the unit physical quantity 34 and output, or the base scale value 38, the full scale value 3
The input data 25b in the integer format 35c is converted into a physical quantity in the normalized integer format 35a using the 9 and the unit physical quantity 34, and is output.

Next, the CPU 23 performs an operation based on the real number data input from the PIO 32 and outputs the real number data obtained by the operation to the PIO 32 via the PIO interface 31 or the integer data input from the PIO 32 , And outputs the result to the PIO 32.

When the data format 35 of the output data 25c indicates the normalized integer format 35a, the PIO 32 generates a CP based on the base scale value 38 and the full scale value 39.
Convert real number data supplied from U23 into normalized integer format 35
The data is converted to the data of “a” and output to the outside via the PIO interface 31. Data format 35 of output data 25c
Indicates the real number format 35b, the CPU 23 outputs the real number data after the calculation is performed as it is.

Next, an example in which the conversion operation of the programmable controller according to one embodiment of the present invention is performed on the network 27 will be described. In FIG. 3, the network 27
Is the input data 25 stored in the data memory 25
b, base scale value 38, full scale value 39, unit physical quantity 34, and data format 35 of input attribute data 25e
Are read out via the network interface 26, and the data format 35 of the input data 25b is referred to. When the input data 25b is expressed in the normalized integer format 35a, the input data 25b is read based on the base scale value 38 and the full scale value 39. The input data 25b is converted into real number data, and the real number data obtained by the conversion is supplied to the CPU 23,
By using the base scale value 38, the full scale value 39, and the unit physical quantity 34, the normalized integer form 35a
Is converted into data of an integer format 35c and output.

When the input data 25b is expressed in the real number format 35b, the input data 25b is
3, the input data 25b indicating the physical quantity in the real number format 35b is converted into the data in the integer format 35c and output by using the unit physical quantity 34.

When the input data 25b is expressed in the integer format 35c and the input data 25b is directly accessed, the input data 25b is directly supplied to the CPU 23, or the input data 25b is expressed in the integer format 35c. When the input data 25b is taken out as a physical quantity, the data in the integer format 35c is converted into a physical quantity in the real number format 35b using the unit physical quantity 34 and output, or the full scale value 39, the base scale value 38, the unit physical quantity For example, the data of the integer format 35c is converted into a physical quantity of the normalized integer format 35a by using the data 34 and output.

Next, the CPU 23 performs an operation based on the real number data input from the network 27 and transmits the real number data obtained by the operation to the network interface 2.
6 and outputs the result to the network 27 by performing an addition operation or the like on the integer data input from the network 27.

When the data format 35 of the output data 25c indicates the normalized integer format 35a, the network 27 converts the real number data supplied from the CPU 23 into the normalized integer format 35a based on the base scale value 38 and the full scale value 39. , And output to the outside via the network interface 26. When the data format 35 of the output data 25c indicates the real format 35b, the CPU 2
The real number data after the calculation is performed from 3 is output as it is.

Next, an example in which the conversion operation and the display operation of the programmable controller according to the embodiment of the present invention are performed by the monitoring operation unit 28 will be described. 3, the monitoring operation unit 28 reads out the base scale value 38, the full scale value 39, the unit physical quantity 34, and the data format 35 of the input data 25b and the input attribute data 25e stored in the data memory 25, and Reference is made to the data format 35 of the data 25b. Then, by using the unit physical quantity 34, the physical quantity in the real number format 35b is converted into the integer format 35c.
By converting the physical quantity in the normalized integer format 35a into data in the integer format 35c by using the base scale value 38, the full scale value 39, and the unit physical quantity 34 to store the data in the data memory 25. It is stored in the data memory 25. When setting the input data 25b from the setting device 30, a numerical value input in a decimal format or a decimal exponent format is converted into normalized integer data or real number data using the base scale value 38 and the full scale value 39,
The data is stored in the data memory 25 and the monitoring operation unit 28
For example, when the input data 25b is displayed as a bar graph, the base scale value 38 and the full scale value 39 are read from the data memory 25 together with the input data 25b, and the input data 25b is read using the base scale value 38 and the full scale value 39. When the input data 25b is converted into an appropriate display dot number and displayed on the display 29, or when the input data 25b is expressed in an integer format 35c, the input data 25b is converted into a physical value in a real number format 35b using the unit physical quantity 34. Input data 25 using the full scale value 39, the base scale value 38, and the unit physical quantity 34.
b is converted into a physical quantity in the normalized integer format 35a and displayed.

Next, an example in which the conversion operation and the display operation of the programmable controller according to the embodiment of the present invention are performed by the program loader 21 will be described. In FIG.
The program loader 21 calculates the base scale value 38, the full scale value 39, and the unit physical quantity 3 of the input data 25b and the input attribute data 25e stored in the data memory 25.
4 and the data format 35, and read the input data 25.
Reference is made to the data format 35 of b. Then, a numerical value input in a decimal format or a decimal exponent format is converted into normalized integer data or real number data using the base scale value 38 and the full scale value 39, and stored in the data memory 25 or a unit physical quantity. 34, the real number format 3
The physical quantity of the normalized integer format 35a is converted into the integer format by converting the physical quantity of the 5b into the data of the integer format 35c and storing it in the data memory 25, or by using the base scale value 38, the full scale value 39 and the unit physical quantity 34. 35c
, And store it in the data memory 25.

The program loader 21 reads the base scale value 38 and the full scale value 39 together with the input data 25b from the data memory 25, and uses the base scale value 38 and the full scale value 39 to convert the input data 25b into an appropriate display dot. If the input data 25b is converted to a number and displayed on a monitor, or the input data 25b is expressed in an integer format 35c, the input data 25b
Is converted to a physical quantity in the real number format 35b and displayed, or the input data 25b is converted to the normalized integer format 3 using the full scale value 39, the base scale value 38, and the unit physical quantity 34.
It is converted to the physical quantity of 5a and displayed.

Next, an example in which a physical quantity conversion operation and an integer operation are performed by a programmable controller according to an embodiment of the present invention will be described. In FIG. 8, when extracting the input data as a physical quantity, the physical quantity conversion calculator 43 converts the input data in the integer format 35c into the physical quantity in the real format 35b using the unit physical quantity of the attribute data. And a real number multiplier 45.

The integer adder 47 performs addition of integer data, and has an integer adder 48. When extracting the input data as a physical quantity, the physical quantity conversion computing unit 51 converts the input data in the integer format 35c into the physical quantity in the real number format 35b using the unit physical quantity of the attribute data. A multiplier 53 is provided.

The input data 41 and the count integrated value 49 have attribute data 42 and 50, respectively.
c and the unit physical quantity 34 is 2.5 mm, and the attribute data 50 indicates that the data format 35 of the count integrated value 49 is an integer format 35c and that the unit physical quantity 34 is 2.5 mm. ing.

When the input data 41 is taken out as a physical quantity, the data format 35 of the input data 41 is changed to the integer format 35c.
Therefore, the input data 41 is supplied to the physical quantity conversion calculator 43 to be converted into a physical quantity. That is, the input data 41
Is converted to a real number by the real number converter 44, and then the 2.5 m set as the unit physical quantity 34 of the attribute data 42 is set.
m is multiplied by a real number multiplier 45 to convert the input data 41 into length data 46 as a physical quantity.

When the input data 41 is directly accessed and the input data 41 is integrated, the input data 41 is supplied as it is to the integer adder 47, and the addition with the count integrated value 49 is performed by the integer adder 48. The addition result is set as a new count integrated value 49.

When the count integrated value 49 is taken out as a physical quantity, since the data format 35 of the count integrated value 49 is an integer format 35c, the count integrated value 49 is supplied to the physical quantity conversion calculator 51 to be converted into a physical quantity. That is, the count integrated value 49 is converted into a real number by the real number converter 52, and then multiplied by 2.5 mm set as the unit physical quantity 34 of the attribute data 50 by the real number multiplier 53, and the count integrated value 49 is converted into a physical quantity. Length integrated data 54
Convert to

Since the length integrated data 54 is calculated based on the count integrated value 49 obtained by integrating the count value as it is, the accuracy is improved as compared with the case where it is calculated by the conventional programmable controller.

The physical quantity conversion calculators 43 and 51 can be realized as functions of the CPU 22 in FIG. 3 and also as functions of the network 27 and the monitoring operation unit 28.

As described above, according to the programmable controller of one embodiment of the present invention, the data format and the unit physical quantity for one digit of the data are set in accordance with the data, and the conversion of the integer format data is not performed. In this way, by directly accessing the data in the integer format and performing the operation with the data in the integer format as it is, it is possible to suppress the increase in the error caused by the data conversion and to set the unit physical quantity corresponding to the data. Is multiplied by the data and then the data is taken out, so that the data can be accessed with a physical quantity.

In the above embodiment, the unit physical quantity 3
4 has been described in the floating-point format, but the unit physical quantity 34 may be represented by a combination of the coefficient value 36 and the exponent value 37 in the decimal format as shown in FIG. For example, the coefficient value 36 is an 8-bit value in the range of 1 to 255, and the exponent value 37 with the base 10 is -128 to
If the 8-bit value is in the range of 127, the unit physical quantity 34 is 16 bits, so that the memory capacity can be saved as compared with the case where the unit physical quantity 34 is expressed in the floating-point format. Also,
The display 29 and the program loader 21 of the monitoring operation unit 28
Is easy to understand because it is usually displayed in decimal.

[0092]

As described above, according to the present invention,
By setting information indicating a unit physical quantity corresponding to one digit of data and information indicating a data format in association with the data, data in an integer format can be directly extracted based on the data format, or data and a unit physical quantity can be extracted. Can be multiplied and extracted, and the data can be converted into a physical quantity and extracted without increasing the error.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a functional configuration of a programmable controller according to one embodiment of the present invention.

FIG. 2 is a block diagram showing a functional configuration of a programmable controller according to one embodiment of the present invention.

FIG. 3 is a block diagram showing a schematic configuration of a programmable controller according to one embodiment of the present invention.

FIG. 4 is a block diagram showing a schematic configuration of a data memory according to one embodiment of the present invention.

FIG. 5 is a block diagram showing a schematic configuration of attribute data according to the first embodiment of the present invention.

FIG. 6 is a diagram showing a data structure indicating a data format according to an embodiment of the present invention.

FIG. 7 is a block diagram showing a schematic configuration of attribute data according to a second embodiment of the present invention.

FIG. 8 is a block diagram showing a schematic configuration of an arithmetic unit according to one embodiment of the present invention.

FIG. 9 is a block diagram showing a schematic configuration of a conventional data memory.

FIG. 10 is a block diagram illustrating a schematic configuration of a conventional addition operation unit.

FIG. 11 is a block diagram showing a schematic configuration of attribute data of the prior application.

FIG. 12 is a block diagram showing a schematic configuration of an addition arithmetic unit of the prior application.

FIG. 13 is a block diagram showing a schematic configuration of attribute data of the prior application.

FIG. 14 is a diagram showing the structure of data indicating the data format of the prior application.

FIG. 15 is a block diagram showing a schematic configuration of an addition arithmetic unit of the prior application.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Programmable controller 2 Data format provision means 3 Unit physical quantity provision means 4 Arithmetic processing means 11 Input / output means 12 Communication means 13 Program means 14 Program storage means 15 Data storage means 15a Normalized integer data 15b Attribute data 16 Calculation means 17 Monitoring operation means Reference Signs List 21 program loader 22 loader interface 23 CPU 24 program memory 25 data memory 25a operation data 25b, 41 input data 25c output data 25d operation attribute data 25e input attribute data 25f output attribute data 26 network interface 27 network 28 monitoring operation unit 29 display 30 Setting device 31 PIO interface 32 PIO 42, 50 Attribute data 34 Unit physical quantity 35 Data indicating data format 35 Data indicating a normalized integer format 35b Data indicating a real number format 35c Data indicating an integer format 36 Coefficient value 37 Exponent value 38 Base scale value 39 Full scale value 43,51 Physical quantity conversion calculator 44,52 Real number converter 45,53 Real number Multiplier 46 Length data 47 Integer adder 48 Integer adder 49 Count integrated value 54 Length integrated data

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hitoshi Nagatsuka 1 Fujimachi, Hino City, Tokyo Inside Fujifacom Control Co., Ltd.

Claims (28)

[Claims] An input / output means for inputting / outputting data from / from the outside; a communication means for performing data communication with the outside; a program means for creating a program; a program storage means for storing the program; A data storage unit for storing a data format including a unit physical quantity and an integer format represented by one digit of the data in association with the data; a calculation unit for performing a calculation based on the program; and a system monitoring operation. A programmable controller, comprising: 2. The programmable controller according to claim 1, wherein the unit physical quantity and the data format are generated by the program unit, and the data format generated by the program unit is stored in the data storage unit. . 3. The programmable controller according to claim 1, wherein the unit physical quantity and the data format received by the communication unit are stored together with data in the data storage unit. 4. The method according to claim 1, wherein the unit physical quantity and the data format are changed by the monitoring operation means, and the unit physical quantity and the data format changed by the monitoring operation means are stored in the data storage means. Item 2. The programmable controller according to Item 1. 5. The method according to claim 1, wherein the unit physical quantity is expressed in a floating-point format, and floating-point arithmetic is performed based on the unit physical quantity to convert the integer-format data into a real-format physical quantity. 4. The programmable controller according to 1. 6. The integer physical data is converted to a decimal physical quantity by expressing the unit physical quantity in a decimal form by a combination of a coefficient value and an exponent value and performing an integer operation based on the unit physical quantity. The programmable controller according to claim 1, wherein: 7. The arithmetic means converts the data in integer format into a physical quantity in real number format by using the unit physical quantity based on the data format, and stores the data in the data storage means. The programmable controller according to claim 1. 8. The calculation means uses a full-scale value and a base-scale value indicating 100% and 0% of a calculation target range of the physical quantity represented by the data, based on the data format. 2. The programmable controller according to claim 1, wherein the data in the integer format is converted into a physical quantity in a normalized integer format and stored in the data storage means. 9. The method according to claim 8, wherein the calculating means uses the unit physical quantity based on the data format to convert a real quantity physical quantity into integer format data and stores the data in the data storage means. The programmable controller according to claim 1. 10. The arithmetic means uses a full scale value and a base scale value indicating 100% and 0% of a range to be operated on the unit physical quantity, the physical quantity represented by the data, based on the data format. 2. The programmable controller according to claim 1, wherein the physical quantity in a normalized integer format is converted into data in an integer format and stored in the data storage means. 11. The method according to claim 1, wherein the input / output unit converts the data in the integer format into a physical quantity in the real number format and inputs the data by using the unit physical quantity based on the data format. 4. The programmable controller according to 1. 12. The input / output means uses a full-scale value and a base-scale value indicating 100% and 0% of a calculation target range of the physical quantity represented by the data, based on the data format. 2. The programmable controller according to claim 1, wherein the data in the integer format is converted into a physical quantity in a normalized integer format and input. 13. The system according to claim 1, wherein said input / output means converts the physical quantity in a real number format into data in an integer format and outputs the data by using said unit physical quantity based on said data format. 4. The programmable controller according to 1. 14. The input / output means uses a full-scale value and a base-scale value indicating 100% and 0% of a calculation target range of the physical quantity represented by the data, based on the data format. 2. The programmable controller according to claim 1, wherein the controller converts the physical quantity in the normalized integer format into data in the integer format and outputs the data. 15. The method according to claim 1, wherein the communication unit converts the data in the integer format into a physical quantity in the real number format and inputs the data by using the unit physical quantity based on the data format. The programmable controller as described. 16. The communication means uses a full-scale value and a base-scale value indicating 100% and 0% of a calculation target range of the physical quantity represented by the data, based on the data format. 2. The programmable controller according to claim 1, wherein the data in the integer format is converted into a physical quantity in the normalized integer format and input. 17. The method according to claim 1, wherein the communication unit converts the physical quantity in real number format into data in integer format and outputs the data by using the unit physical quantity based on the data format. The programmable controller as described. 18. The communication means uses a full-scale value and a base-scale value indicating 100% and 0% of a calculation target range of the physical quantity represented by the data, based on the data format. 2. The programmable controller according to claim 1, wherein the physical quantity in a normalized integer format is converted into integer format data and output. 19. The system according to claim 1, wherein the monitoring operation unit converts the data in the integer format into a physical quantity in the real number format and displays the data by using the unit physical quantity based on the data format. 4. The programmable controller according to 1. 20. The monitoring operation means uses a full-scale value and a base-scale value indicating 100% and 0% of a calculation target range of the physical quantity represented by the data, based on the data format. By doing
2. The programmable controller according to claim 1, wherein data in an integer format is converted into a physical quantity in a normalized integer format and displayed. 21. The monitoring and operating means converts a physical quantity in a real number format into data in an integer format by using the unit physical quantity based on the data format, and stores the data in the data storage means. The programmable controller according to claim 1, wherein 22. The monitoring operation means uses a full-scale value and a base-scale value indicating 100% and 0% of a calculation target range of the unit physical quantity, the physical quantity represented by the data, based on the data format. By doing
Convert a physical quantity in normalized integer format to data in integer format,
2. The programmable controller according to claim 1, wherein the data is stored in the data storage unit. 23. The program unit, by using the unit physical quantity based on the data format,
2. The programmable controller according to claim 1, wherein data in an integer format is converted into a physical quantity in a real number format and displayed. 24. The program means uses a full-scale value and a base-scale value indicating 100% and 0% of a range to be calculated for the physical quantity represented by the data, based on the data format. 2. The programmable controller according to claim 1, wherein the data in an integer format is converted into a physical quantity in a normalized integer format and displayed. 25. The program unit, by using the unit physical quantity based on the data format,
2. The programmable controller according to claim 1, wherein a physical quantity in a real number format is converted into data in an integer format and stored in the data storage unit. 26. The program unit uses a full scale value and a base scale value indicating 100% and 0% of a calculation target range of the physical quantity represented by the data, based on the data format. 2. The programmable controller according to claim 1, wherein the physical quantity in the normalized integer format is converted into data in the integer format and stored in the data storage means. 27. A data format assigning unit for assigning a data format including an integer format to data, a unit physical quantity assigning unit for assigning a unit physical quantity represented by one digit of the data, and a data format and a unit physical quantity based on the data format and the unit physical quantity. A programmable controller comprising: an arithmetic processing unit for performing arithmetic processing. 28. A storage medium for a programmable controller which stores attribute data including a unit physical quantity of data in association with the data.