JPH01283697A - Supervisory and control device - Google Patents

Abstract

PURPOSE:To improve the data transmission efficiency of the title device by providing a means which sets a data bit number in corresponding to the kind of the sensor of terminal equipment to a central monitor and a means which returns data of a prescribed bit number in response to a data returning request called from the central monitor to the terminal equipment. CONSTITUTION:The central monitor 1 sets the bit number of sensor data to each terminal equipment 3 from kind data from each terminal equipment 3 and does not perform fetching of returned data unless the returned data having the bit number corresponding to each terminal equipment 3 when an ordinary data returning request is made. In addition, each terminal equipment 3 is constituted in such a way that the equipment 3 returns only the returning data of the bit number set to its own equipment upon receiving a call of data returning request. In other words, the length of the returning data is different depending upon the kind of each terminal equipment 3 and the returning data can be returned without vacant space. The central monitor 1 performs judging processing in accordance with the kind of each terminal equipment 3 from the returned data and a warning display or control of an air-conditioning device depending upon a judged result. Therefore, the data transmission efficiency of this device can be improved as a whole and the transmission speed is apparently improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a monitoring and control device that performs fire alarms, intrusion alarms, air conditioning control, etc. based on detection data from a plurality of various sensors.

[Prior Art] Conventionally, a central monitoring device is connected to multiple terminal devices equipped with different types of sensors via the same transmission line, and the central monitoring device sequentially calls each terminal device to collect sensor detection data. The called terminal device sends back the data detected by the sensor.

Based on this detection data, the central monitoring device determines whether there is a fire, gas leak, intrusion, etc., and controls the air conditioner.If the same type of transmission circuit is used to send back the detection data of different types of sensors, Each terminal uses a transmission circuit that can return data that requires the largest number of bits.

[Problem to be solved by the invention] In the transmission circuit of a monitoring and control device used for multiple purposes, the size (number of bits) of returned data varies depending on the type of sensor.For example, in the case of an intrusion detector, the detected data is 1 Temperature sensors used for air conditioning may have a dynamic range (-10 to 100°C), a resolution (0, 1
℃), 11 bits are required. Therefore, if the same type of transmission circuit is used for all terminals, the intrusion sensor terminal will return almost empty information if the transmission circuit is capable of returning detection data from an air conditioning sensor. Therefore, overall transmission efficiency decreases,
The disadvantage is that the apparent transmission speed also decreases.

[Means for Solving the Problems] A monitoring and control device of the present invention includes a plurality of terminal devices equipped with different sensors for temperature, smoke, gas, intrusion, etc., and connected to the plurality of terminal devices via a transmission line. The central monitoring device sequentially calls the plurality of terminals using digital transmission means to collect sensor information,
In a monitoring control device that makes control decisions for alarm indicators, disaster prevention equipment, air conditioners, etc. based on sensor information, the central monitoring device includes means for setting in advance the number of data bits corresponding to the type of sensor of the terminal device, and The device is characterized in that it includes means for returning data of a predetermined number of bits in response to a call data request from the central monitoring device.

[Operation] When data is collected from a plurality of terminals having different amounts of information, the returned data can be configured with the number of bits corresponding to the amount of information, and information can be compiled from the returned data with no empty space.

[Embodiment] An embodiment of the supervisory control device of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram showing an embodiment of the supervisory control device of the present invention. This monitoring control device includes a central monitoring device 1,
It consists of a transmission line 2 extending from the central monitoring device 1 and a plurality of terminals 3 connected to the transmission line 2 and each equipped with a different type of sensor. The central monitoring device 1 includes a central processing unit 10, a storage device 11, an interface 12, 13, a transmission circuit 14 for transmitting and receiving signals to and from each terminal device 3, and a display and operation section 15 for displaying alarms and inputting operations. It is configured.

To explain the operation of the monitoring and control device configured in this way, the central processing unit 10 of the central monitoring device 1 has storage bags W, 11
Execute the program stored in . When this program is executed, the central processing unit 10 drives the transmission circuit 14 via the interface 12 to sequentially call each terminal device 3. The call signal is composed of an address and a command. At the first call when the power is turned on, a type data return request is made to each terminal 3, so the command is a type data request. The central monitoring bag W1 calculates the number of bits of sensor data from the type data from each terminal 3.
Set each time. This operation is not necessary if the type of each terminal device 3 is stored in advance in the storage device 11. Once the number of bits of the return data of each terminal device 3 is set, the central monitoring bag f1
When making a normal return data request, only the number of bits corresponding to each terminal device 3 is taken in, and when the terminal device 3 receives a call for a return data request, it retrieves the return data set for itself. It is configured so that only the number of bits is returned. That is, the kz of the return data differs depending on the type of each terminal 3, and it is possible to return the return data with no empty space. The central monitoring device 1 performs judgment processing according to the type of the terminal device 3 from this returned data, and depending on the judgment result, displays an alarm or controls the air conditioner.

Next, a specific embodiment of the terminal device 3 will be described based on the block diagram shown in FIG. This terminal device 3 is the transmission line 2
a transmission circuit 20 that receives signals from the computer and converts them into serial/parallel signals, converts various data signals into parallel/serial converters, and sends them to the transmission line 2; and an address setter 21 that sets a unique address.
and the reception address and address setter 21 of the transmission circuit 20.
an address comparator 22 that outputs an address match pulse when the set address compares with a set address, and a transmission circuit 20 based on the address match pulse from the address comparator 22.
Command identifier 2 that identifies command signals from
3, a type setter 24 that applies type data to the transmission circuit 20 according to the control signal from the command identifier 23;
The transmission circuit 20 receives a control signal from the command identifier 23.
a return data setter 25 for applying sensor data to the
The return data setting device 25 is composed of a detector 26 that applies sensor detection data to the return data setting device 25.

To explain the operation of the terminal device 3 configured in this way, the transmission circuit 20 receives the calling signal from the central monitoring device 1 via the transmission line 2, converts it into serial and parallel signals, and sends the address part signal to the address comparator 22. Output. Address comparator 22
compares the received address with the address set by the address setter 21 and outputs an address match pulse to the command discriminator 23 if they match. The command discriminator 23 analyzes the command part signal from the transmission circuit 20 based on the address matching pulse. The command identifier 23 analyzes the command and outputs a control signal to the type setter 24 if the command is a type data request, and outputs a control signal to the return data setter 25 if the command is a sensor data request. When a control signal is applied to the setting device 24, the transmission circuit 2
Apply type data to 0. The return data extractor 25 supplies a preset number of bits of sensor data from the detector 26 to the transmission circuit 20 when the control signal is applied. If the detector 26 is an on/off type sensor, the returned data is 2 to 3 bits since it only contains information on detection, failure, etc.

Since the return data setter 25 has the bit length of the data to be returned set in advance, the internal gate opens only for the set number of bits of the data input from the detector 26, and the internal gate opens for the remaining number of data bits. Because it is closed,
The number of bits of the return data output from the return data setter 25 to the transmission line 2 via the transmission diagram I#r20 is determined by the number of bits set by the return data setter 25.

Next, another embodiment of the terminal device 3 will be described based on the block diagram shown in FIG. This terminal device 3 is the terminal device 3 shown in FIG. 2 in which the detector 26 is equipped with a sensor for detecting temperature, smoke, gas, etc.
An AD converter 27 is provided between the detector 5 and the detector 26. The analog signal detected by the detector 26 is converted into a digital signal by the AD converter 27 and is supplied to the return data setting device 25.The other configuration and operation are the same as the terminal device 3 shown in FIG. The explanation will be omitted. Since analog data detected by the detector 26 is sent back, the number of return data bits is determined by the detection range (dynamic range) and resolution detected by the detector 26, and the number of bits is particularly large in the case of a temperature sensor used for air conditioning etc. . In this case, an AD converter 27 with the same resolution is used, and the terminal 3
Depending on the purpose of use, it is also possible to open the internal gate of the return data setter 25 by the set number of bits from the output of the AD converter 27.Next, the central processing unit 10 of the central monitoring unit 1
An example of a processing program executed by the computer is shown in FIG. 4 and will be explained based on a flowchart.

When the power is turned on, first, in step S01, an initialization routine is executed to initialize each buffer and flag.

Step SO2 sets a variable I indicating the address of the terminal to 1, and step SO3 sets a type collection command in a buffer for determining the command. Step SO4 calls the terminal arrest and requests the type data. Step SO5 imports the type and data from the terminal arrest. Step SO6 returns the number of bits of sensor data from the retrieved type data B i t (1) Set.

Step S07 advances variable I one step. Step SO8
determines that the variable ■ has exceeded the final address N. If YES, the process goes to step SO9; if NO, the process returns to step SO4 and performs the same process to terminate the terminal at the next address. In step SO9, the variable I is set to 1. do. Step SIO
sets the sensor data collection command in the command buffer. Step Sll calls a terminal arrest and requests sensor data. Step S12 stores the set number of return bits Bit (1) for each terminal in the buffer Buf that determines the number of return bits. Step S13 takes in one bit of the returned data, and step S14 subtracts the memory of buffer Buf. In step 315, it is determined that the memory of the buffer Buf has become zero. If YES, the process advances to step S16; if NO, the process returns to step S13 and moves to capture the next 1 bit of the returned data. In step S16, the process of the returned data is performed. This is the main routine that displays alarms and controls the air conditioner based on the processing results. Step S17 advances variable I one step. Step 3
18 determines whether the variable exceeds the final address N and selects YES.
If so, return to step SO9 and return to the terminal device with the first address (
Similarly, import sensor data from I.1), and
If o, return to step SIO and terminal device I at the next address
In this way, when the power is turned on, this program requests type data from each terminal, sets the number of return bits for each terminal, and then moves on to normal sensor data capture.

In addition to the above-mentioned embodiment, the return data setter 25 temporarily stores the set bit number in an internal register, presets it in an internal counter immediately before returning, sets the data bits of the detector 26 or AD converter in an internal shift register, and sets the data bits of the detector 26 or AD converter in an internal shift register. The number of return data bits can be limited by shifting the internal shift register by the value set in . The setting bit number information in the return data setting device 25 may be set on the terminal device 3 side, or it may be set on the transmission line 2 from the central monitoring device 1.
The number of setting and setting bits may be set via .

[Effects of the Invention] As explained above, when the amount of returned data differs depending on the type of terminal device, the supervisory control device of the present invention forms the returned data with the number of bits corresponding to the amount of data, which improves transmission efficiency. Efficiency is improved and the apparent transmission speed is increased, making it possible to shorten the polling period. The number of bits of transmitted data can be set according to the type of terminal device, increasing the scope of system application.If the amount of returned data is small, the cost of the terminal device can be reduced by considering the circuit configuration for the number of bits to be targeted. It has excellent features such as:

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the supervisory control device of the present invention, FIG. 2 is a block diagram showing one embodiment of the terminal device of the same device, and FIG. 3 is a block diagram showing another embodiment of the terminal device of the same device. FIG. 4 is a block diagram showing an example, and FIG. 4 is a flowchart showing an example of a program executed by the central monitoring device of the device. DESCRIPTION OF SYMBOLS 1... Central monitoring device, 2... Transmission line, 3... Terminal device, 10... Central processing unit, 11... Storage device,
12.13...Interface, 14.20...
Transmission circuit, 15...Display operation unit, 21...Address setter, 22...Address comparator, 23...Command identifier, 24...Type setter, 25...Return data setting instrument, 26...detector, 27...AD converter.

Claims (1)

[Claims] It consists of a plurality of terminal devices equipped with different sensors for temperature, smoke, gas, intrusion, etc., and a central monitoring device connected to the plurality of terminal devices via transmission lines, and the central monitoring device is a digital transmission system. In the monitoring and control device that sequentially calls the plurality of terminal devices using a means to collect sensor information and makes control decisions for alarm indicators, disaster prevention equipment, air conditioners, etc. from the sensor information, the central monitoring device calls the terminal devices in advance. The terminal device is characterized by comprising means for setting the number of data bits corresponding to the type of sensor of the device, and means for the terminal device to return a predetermined number of data bits in response to a call data request from the central monitoring device. Supervisory control equipment.