JPH0659721A - Digital controller - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a digital control device capable of stably setting forced ON / OFF of input / output conditions and simulated input at the time of test and easily performing restoration. [Structure] In a digital control device that performs arithmetic processing based on input / output data of a plant, a data memory for storing external input / output of the plant, an operation result, and set value data, and an independent simulated data memory having the same configuration as this data memory. And a registration memory for registering a simulation area of this simulation data memory, and a changeover switch for executing simulation calculation, and the registered simulation area and the area of the data memory corresponding to other areas It is characterized in that it is configured so as to execute a simulated calculation process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital controller capable of performing simulated arithmetic processing.

[0002]

2. Description of the Related Art Generally, a digital controller (programmable controller, etc.) constructed by using a microcomputer is provided with a data memory for data input / output, and an arithmetic unit (CPU), an operating device and Data exchange with external plant equipment such as detection equipment is performed via this input / output data memory. That is,
The plant state is taken into the arithmetic unit via the input / output data memory, a predetermined arithmetic operation based on the program is performed, and the arithmetic result is output again to the plant operating device or the like via the input / output data memory.

Recently, this digital control device can be used not only for the normal operation of a plant but also forcibly turning it on and off in the event of an input failure of the plant, or by giving a simulated input during a test to perform a periodic test or There is an increasing demand for use in adjustment tests. Further, particularly in a system having many transmission systems, there is an increasing need to turn on / off a remote input condition.

[0004]

However, in the conventional digital control device, in order to turn on / off the input condition, the input contact is forced to be turned on / off externally, or a specific logic is incorporated to force the input contact. Since it was turned on / off, it was necessary to build the software required for forced ON / OFF of tests and input conditions on the memory originally required for plant logic.

Therefore, in the data memory, the plant equipment data and the temporary compulsory conditions such as the data necessary for the test are mixed, which may be erroneous at the time of the operation or the restoration, and the confirmation work may be performed. It was tough. Also, as in recent years, when many transmission systems are used and the number of input / output points increases, there is a concern that operational complexity, human error, or capacity increase of the simulation logic may occur. There is.

The present invention has been made in order to solve such a problem, and a digital control device capable of stably setting forced ON / OFF of input / output conditions and a simulated input at the time of test and easily performing restoration. It is intended to provide.

[0007]

SUMMARY OF THE INVENTION A digital controller according to the present invention is a digital controller for performing arithmetic processing based on input / output data of a plant.
A data memory for storing calculation results and set value data, a simulated data memory having the same configuration as this data memory and independent, a registration memory for registering a simulated area of this simulated data memory, and a changeover switch for executing simulated calculation And the registered simulated area and the area of the data memory corresponding to an area other than the registered simulated area, and the simulated arithmetic processing is executed.

[0008]

As described above, in the digital controller according to the present invention, the simulated input / output setting and the simulated data memory capable of storing the simulated calculation result are made to correspond one-to-one with the data memory during normal plant operation. Since it was provided as an independent memory, the simulated area was registered in advance on this simulated data memory, and the simulated value was input to the required simulated point in the simulated area, it was as if it was for normal operation corresponding to this simulated point. The operation can be executed as if the data was input to the area of the data memory. Further, when it is desired not to output the calculation result to the outside of the plant, by registering it in the registration memory, the result of the calculation processing operation is output only to the simulated data area and is not output to the outside. Further, since the changeover switch for executing the simulation calculation is provided, the normal plant operation execution calculation and the simulation calculation can be executed separately, and the simulation cancellation and the execution can be performed safely. The settings can also be set separately from the normal plant data area.

[0009]

Embodiments of the present invention will now be described with reference to FIGS.

FIG. 1 shows an example of the configuration of the device of the present invention.
Arithmetic unit (CPU) 1, plant logic memory 2, data memory 3 for normal operation for storing input / output data for interfacing with plant input / output devices, simulated data having the same configuration as this data memory 3 and areas corresponding one to one The memory 3A, the changeover switch 4 for switching between the data memory for normal operation and the simulated data memory, the registration memory 5 for determining the usage range of the simulated data memory 3A, and the maintenance tool 6 are controlled by the arithmetic unit 1. Arithmetic processing is performed. Further, the maintenance tool 6 is used for setting data of a normal digital control device, setting of simulated data, monitoring, and the like. Next, the operation of the digital control device configured as described above will be described by focusing on the target simulation setting function and processing method.

During normal operation, the changeover switch 4 is normally in the (N) position. At this time, the arithmetic processing is executed by the arithmetic unit 1, the plant logic memory 2, and the data memory 3 as in the above-described arithmetic processing in the conventional digital control apparatus. In that case, the simulated data memory 3A is kept unused.

On the other hand, when the simulated data is set and is operated in combination with the input data of the plant, is operated only by the simulated data, or is output to the simulated data memory only without being output to the plant. First, the use range (simulated area) of the simulated data memory 3A is registered in the registration memory 5. This registration is performed by setting use (for example, "1") or non-use (for example, "0") for each point on the simulated data memory 3A.

By registering the simulated area as described above and setting the changeover switch 4 to the simulated position S, the points of the simulated data memory 3A registered in the simulated area are determined as areas to be arithmetically processed. In this case, as the data memory 3, an area other than the area corresponding to the area of the simulated data memory 3A that is not registered as the simulated area is used and the arithmetic processing is performed. That is, in FIG.
When the changeover switch 4 is in the simulated position S, it is recognized that one data memory is constituted by the shaded area of the simulated data memory 3A and the shaded area of the data memory 3, and the arithmetic processing is performed. Is executed.
When the changeover switch 4 is in the normal position N, only the data memory 3 is selected and arithmetic processing is performed. FIG. 2 shows the flow.

As shown in FIG. 3, if the data input section 5A is registered in the simulated area on the simulated data memory 3A, data can be set (bit input, analog input, etc.) by the maintenance tool 6 or the like, and the external plant can be used. The data can be separated and set. Further, when there is a point that is not desired to be output to the outside during the simulated operation, the output point 5B is registered in the area on the simulated data memory 3A so that the simulated calculation result is not output to the outside and the simulated data memory It is stored in 3A. In this case, the data stored in the simulated data memory 3A can be monitored by the maintenance tool 6 or the like.

As described above, in the present invention, the registration of the simulated area for the signal and the setting of the simulated data can be carried out independently of the data area of the normal plant, and the switching operation can surely switch the normal plant operation and the simulated operation. It can be processed. Moreover, the simulated setting area and the simulated data can be switched at the time of a fixed periodic inspection, and the data can be automatically set in the simulated area by the external maintenance tool 6 or the like, so that the function can be easily expanded. . Since this can usually be done without changing the logic and data area of the plant, it is possible to carry out the simulation operation safely and reliably. Further, turning on / off (jumper, lift) of the external input contact and turning on / off (jumper, lift) of the output by the function simulation can be performed in the digital controller by the simulation setting.

The digital control device has data areas for input, output, intermediate data of calculation results, set value data, etc. In the above embodiment, these data memories are collectively described. It is also possible to classify and execute simulated data. Further, the present invention can be applied to the changeover switch also in the case where the changeover switch is combined with the above-mentioned simulation, normal monitor, set value tuning, or the like.

[0017]

According to the present invention, since the same data memory is provided independently of the data memory of the normal plant, and the simulated operation can be performed by registering the simulated area and the simulated setting, safe and reliable operation is possible. Is.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a device of the present invention.

FIG. 2 is a process flow chart in the embodiment of the device of the present invention.

FIG. 3 is an explanatory view explaining the operation of the device of the present invention.

[Explanation of symbols]

 1 ... Calculation device 2 ... Plant logic memory 3 ... Data memory 3A ... Simulated data memory 4 ... Changeover switch 5 ... Registration memory 6 ... Maintenance tool.

Claims (1)

[Claims] 1. A digital controller for performing arithmetic processing based on input / output data of a plant, a data memory for storing external input / output of a plant, an operation result, and set value data, and an independent simulation with the same configuration as this data memory. A data memory, a registration memory for registering a simulation area of the simulation data memory, and a changeover switch for executing simulation calculation, and the registered simulation area and areas of the data memory corresponding to other areas. A digital controller characterized in that it is configured to execute a simulated calculation process using.