JP5235609B2 - Special unit simulation program creation device, programmable controller simulation device, and method - Google Patents

Description

  The present invention relates to a special unit simulation apparatus creating apparatus and a CPU for creating a special unit simulation program that operates in cooperation with a CPU unit program of a CPU unit of a programmable controller (hereinafter referred to as PLC) in consideration of various settings of the special unit. The present invention relates to a programmable controller simulator for operating a unit program and a special unit simulation program in cooperation with each other.

  When a special unit that expands the function of the PLC CPU unit is mounted on the PLC, the CPU unit program that operates the PLC CPU unit sends a request to the special unit to execute the operation to the buffer memory of the special unit. Write. The special unit operates based on the request written in the buffer memory, and writes a response corresponding to the request in the buffer memory. Then, the CPU unit program performs an operation for calculating the next request based on the written response.

  That is, in a simulation apparatus that simulates the operation of the CPU unit and the entire PLC using a computer such as a personal computer, it is necessary to simulate the operation of the special unit when the PLC to be simulated has a special unit. For this reason, the programmer has created a special unit simulation program for simulating the operation of the special unit separately from the CPU unit program for controlling the operation of the CPU unit.

  In relation to this, according to Patent Document 1, a correspondence between positioning data transmitted from the CPU unit to the positioning unit and completion data transmitted from the positioning unit to the CPU unit is stored, and the correspondence is used to A technique for simulating the operation of a positioning unit that reads and writes a buffer memory is disclosed.

JP 2004-258926 A

  However, according to the method for creating the special unit simulation program described above, since the memory address assigned to the buffer memory of the special unit changes depending on the installation position of the special unit, changing the installation position also changes the special unit simulation program. There was a need. Further, since the operation of the special unit changes depending on the operation setting parameter for each special unit, it is necessary to change the special unit simulation program even when the operation setting parameter is changed.

  The technique of the above-mentioned Patent Document 1 is not a technique that takes into consideration the memory address that changes depending on the mounting position and the operation of the special unit that changes depending on the operation setting parameter.

  The present invention has been made in view of the above, and a special unit simulation apparatus that creates a special unit simulation program that operates in cooperation with a CPU unit program of a PLC CPU unit in consideration of various special unit settings. It is an object of the present invention to obtain a programmable controller simulation device that operates a creation device, a CPU unit program and a special unit simulation program in cooperation with each other.

In order to solve the above-described problems and achieve the object, the present invention is a special unit that expands the function of the CPU unit of the programmable controller, and the request is written by the I / O request processing by the CPU unit, The written request is read by the I / O response processing by the unit, and the operation at the time of the I / O response processing of the special unit having a buffer memory in which the response corresponding to the read request is written is simulated. In the special unit simulation program creation device that creates the special unit simulation program
Information acquisition means for acquiring the type of special unit, I / O allocation information for allocating the buffer memory to the memory space of the CPU unit, and operation setting values set in the special unit, and the information Creating means for creating a special unit simulation program for simulating I / O response processing executed by the special unit based on the type of special unit acquired by the acquisition means, I / O allocation information, and operation setting value It is characterized by.

  According to the present invention, it is possible to obtain a special unit simulation device creating apparatus that creates a special unit simulation program that operates in cooperation with the CPU unit program of the PLC CPU unit, taking into account various special unit settings.

  Embodiments of a special unit simulation device creating apparatus according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment.
First, in order to help understanding, the configuration of an actual PLC system related to the embodiment of the present invention will be described. FIG. 1 is a block diagram schematically illustrating an actual PLC system.

  In FIG. 1, the PLC system 1000 has a configuration in which a CPU unit 1 that controls the operation of the entire PLC system 1000 and a special unit 2 are mounted on a bus unit 3 at predetermined mounting positions. The special unit 2 is a unit that performs simple calculations and expands the control function of the CPU unit 1. For example, there are various types such as an analog input unit, a positioning unit, a temperature input unit, and a temperature adjustment unit. For example, when the special unit 2 is a temperature control unit, when the CPU unit 1 requests the external device to set the temperature to a predetermined temperature, the temperature control unit is externally set to the predetermined temperature. Perform temperature control on the device. In addition to this, an input unit, an output unit, a motion controller unit that performs multi-axis synchronous control, and the like are mounted on the bus unit 3 according to the application. Here, units other than the CPU unit 1 and the special unit 2 are installed. Description of is omitted.

  The special unit 2 is a memory in which a special unit parameter 21 such as an operation setting parameter 211 set corresponding to the special unit 2 or an external device to be controlled by the own unit 2 and a request from the CPU unit 1 to the own unit 2 are written. A buffer memory 22.

  The CPU unit 1 is a CPU unit program written in a ladder language or the like that realizes the control operation of the entire PLC system 1000, including an operation for calculating a request for causing an external device to write to the buffer memory 22 of the special unit 2 to perform an operation. 11, and CPU parameter 12 including special unit type information 121 indicating the type and model number of the special unit 2 and I / O allocation information 122 for allocating the buffer memory 22 to the memory space used by the CPU unit 1. .

  The CPU unit program 11 calculates various values including a request for the special unit 2, writes the request to a memory address in the memory space described in the program 11, and similarly sends a response to the request to the program. The CPU unit 1 is caused to execute the I / O request processing read from the memory address described in FIG.

  The memory address of the request write destination and the response read destination memory space is associated with each memory address of the buffer memory 22 by the I / O allocation information 122 so that the special unit 2 can be used. The form of the request calculated by the arithmetic processing and written to the buffer memory 22 is not particularly limited. The operation command, the operation command signal, or a target numerical value related to the operation of the special unit 2 (for example, in the case of a temperature control unit, the temperature And so on as long as the special unit 2 can interpret and operate.

  The special unit 2 operates by interpreting the request written in the memory address of the request write destination of the buffer memory 22 based on the special unit operation program included therein, and the response read destination memory of the operation result. I / O response processing to be written to the address is performed. Specifically, the response includes, for example, an operation completion response, an operation incomplete response, or an operation impossible response. Further, the special unit operation program uses the operation setting parameter 211 when interpreting the request written in the buffer memory 22 and controlling the operation, that is, controlling the external device to be controlled. As described above, the operation setting parameter 211 is an operation setting value set according to the special unit 2 and the external device to be controlled. For example, when the special unit 2 is a positioning unit, The speed limit value and acceleration time of the drive shaft are set.

  The CPU unit program 11 being executed by the CPU unit 1 executes arithmetic processing for calculating the next request based on the response read in the I / O request processing.

  As described above, the CPU unit program 11 performs the following arithmetic processing based on the response obtained by the I / O response processing of the special unit 2. Therefore, when the CPU unit program 11 of the PLC system 1000 including the special unit 2 is simulated and executed using a CPU unit program simulator (CPU unit program simulator) on a computer such as a personal computer, the CPU unit program It is necessary to prepare a special unit simulator (special unit simulator) that executes the I / O response process in a simulated manner corresponding to the 11 I / O request processes.

  Incidentally, the I / O allocation information 122 is generally created so that the buffer memory 22 is allocated to a different memory space for each mounting position of the bus unit 3 to which the special unit 2 is mounted. Therefore, the special unit simulation program for realizing the special unit simulator on the computer has to be rewritten every time the mounting position of the bus unit 3 is changed. Similarly, since the special unit 2 performs an operation depending on the operation setting parameter 211, the special unit simulation program needs to be rewritten every time the operation setting parameter 211 is changed. The special unit simulation device creation apparatus according to the embodiment of the present invention acquires a special unit type, I / O allocation information, and operation setting parameters, and automatically performs special unit simulation based on the acquired information. The main feature is creating a program. Below, the detail of the special unit simulation apparatus preparation apparatus of embodiment concerning this invention is demonstrated.

  FIG. 2 is a diagram for explaining the functional configuration of the special unit simulation apparatus creation device according to the embodiment of the present invention. In the following description, the I / O allocation information 122 will be described on the assumption that the leading address of the buffer memory 22 is associated with the leading address in the memory space of the allocation destination. That is, the relative address from the head address in the memory space allocated to the buffer memory 22 corresponds to the relative address from the head address of the buffer memory 22.

  In FIG. 2, the special unit simulation device creation apparatus 4 uses the special unit type information 121 to the special unit 12 type and the I / O allocation information 122 to assign the start address of the buffer memory 22 of the special unit 12 in the memory space. (Hereinafter referred to as head address information), and the operation setting parameter 211 is acquired from the special unit parameter 21. The information acquisition function 41, the type of the special unit 12, the head address information, and the operation setting parameter 211 are acquired. A special unit simulation program template creation function 42 and a default value change function 43, which constitute a function for creating a special unit simulation program based on it, are provided.

  The special unit simulation program template creation function 42 temporarily calculates a special unit simulation program template corresponding to the type from the acquired type of the special unit 12, ie, the memory address and operation setting parameter of the memory space included in the program. A special unit simulation program template that describes only the operation pattern of the special unit 12 in which the value (default value) is used is created. The default value changing function 43 changes the default value used in the created special unit simulation program template based on the acquired head address information and the operation setting parameter 211, and completes the special unit simulation program.

  Here, the special unit simulation device creation apparatus 4 may be a program that realizes an information acquisition function 41, a special unit simulation program template creation function 42, and a default value change function 43 on a computer. Further, the special unit simulation device creation device 4 does not need to directly acquire information such as the type of the special unit from the CPU parameter 12 and the special unit parameter 21 of the PLC system 1000. The CPU parameter 12 and the special unit parameter 21 may be stored in a storage medium such as a registered disk or a hard disk, and the special unit simulation device creation apparatus 4 may read the corresponding information from the recording medium.

  Next, the operation of the special unit simulation device creation apparatus 4 of the present embodiment will be described. FIG. 3 is a flowchart for explaining the operation of the special unit simulation device creation device 4.

  In FIG. 3, first, the information acquisition function 41 acquires the type of the special unit and the head address information from the CPU parameter 12 (step S1). Then, the special unit simulation program template creation function 42 creates a special unit simulation program template corresponding to the special unit of that type from the acquired special unit type (step S2). Then, the default value change function 43 changes the default value of the memory address used in the special unit simulation program template based on the acquired head address information (step S3). Then, the information acquisition function 41 further acquires the operation setting parameter 211 from the special unit parameter 21 (step S4). Then, the default value change function 43 changes the default value of the operation setting parameter used in the special unit simulation program template based on the acquired operation setting parameter 211 (step S5).

  FIG. 4 is a diagram showing a specific example of the operation setting parameters used in the special unit simulation program. In FIG. 4, the value of the portion surrounded by a rectangle is an operation setting parameter set for each special unit. In the special unit simulation program template before acquiring the operation setting parameter 211, the value is shown in FIG. 4. A default value different from the value, for example, all 0 is used. In step S5, the default value is changed based on the acquired operation setting parameter.

  In this way, the special unit simulation program is automatically created. The created special unit simulation program is executed on a computer to realize a special unit simulator that performs an I / O response process corresponding to an I / O request process performed by the CPU unit program simulator. That is, the created special unit simulation program operates in cooperation with the CPU unit program of the CPU unit. When the CPU unit program simulator and the special unit simulator are operated simultaneously, the special unit simulator executes I / O response processing in response to the I / O request processing from the CPU unit program simulator. The operation of the programmable controller including the operation can be simulated.

  By the way, in the above description, when the special unit simulation program is created, after the special unit simulation program template creation function 42 creates the special unit simulation program template, the default value change function 43 is used as the default value for the template. However, the functional configuration and procedure for creating a special unit simulation program are not limited to this, and the type of special unit and I / O assignment that have been obtained Any configuration may be used as long as the special unit simulation program is created based on the information and the operation setting parameters.

  As described above, according to the present embodiment, the special unit type, I / O allocation information, and operation setting parameters are acquired, and the acquired special unit type, I / O allocation information, and operation setting parameters are acquired. Since the special unit simulation program is created based on the above, the special unit simulation device for creating the special unit simulation program operating in cooperation with the CPU unit program of the PLC CPU unit in consideration of various settings of the special unit A creation device can be obtained.

  As described above, the special unit simulation device creation device and the programmable controller simulation device according to the present invention include the special unit simulation program that operates in cooperation with the CPU unit program of the CPU unit of the programmable controller in consideration of various settings of the special unit. Therefore, the present invention is preferably applied to a special unit simulation device creation device and a programmable controller simulation device that operates a CPU unit program and a special unit simulation program in cooperation with each other.

It is a figure which shows the structure of a PLC system. It is a figure which shows the function structure of the special unit simulation apparatus production apparatus of this Embodiment. It is a flowchart explaining operation | movement of the special unit simulation apparatus production apparatus of this Embodiment. It is a figure which shows the specific example of the operation setting parameter currently used for the special unit simulation program.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 CPU unit 2 Special unit 3 Bus unit 4 Special unit simulation apparatus preparation apparatus 11 CPU unit program 12 CPU parameter 21 Special unit parameter 22 Buffer memory 41 Information acquisition function 42 Special unit simulation program template creation function 43 Default value change function 121 Special unit Type information 122 I / O allocation information 211 Operation setting parameter 1000 PLC system

Claims (4)

A special unit that expands the function of the CPU unit of the programmable controller, and the request is written by the I / O request processing by the CPU unit, and the written request is read by the I / O response processing by the special unit, in the special unit simulation program creating apparatus for creating a special unit simulation program for simulating an operation when the I / O response processing of the special unit having a buffer memory response is written that corresponds to the requested read it said,
Information acquisition means for acquiring a type of the special unit, I / O allocation information for allocating the buffer memory to the memory space of the CPU unit, and an operation setting value set in the special unit;
Creating means for creating a special unit simulation program for simulating I / O response processing executed by the special unit based on the type of special unit acquired by the information acquisition means, I / O allocation information, and operation setting value;
A special unit simulation program creation device comprising: The CPU unit writes an arithmetic process for calculating a request, writes the calculated request into the buffer memory of the special unit using the I / O allocation information, and reads out a response corresponding to the request from the buffer memory. O request processing is executed based on the CPU unit program, and after the I / O request processing, further calculation processing is executed based on the read response.
The special unit simulation program creation device according to claim 1. A calculation process for calculating a request for a special unit that expands the function of the CPU unit of the programmable controller, and writing the calculated request in the buffer memory of the special unit according to the I / O allocation information of the CPU unit, and the next calculation CPU unit that performs an I / O request process for reading a response from the special unit used for processing, and performs a simulation by executing a CPU unit program that operates the CPU unit Memorize the program simulation program ,
Acquires the type of the special unit, the I / O allocation information, and the operation setting value set in the special unit, reads the request written in the buffer memory, and responds to the read request the special unit simulation program which simulates the special unit by the I / O response processing to be written into the buffer memory, the type of special unit that the acquired special unit simulation program to create based on the I / O assignment information and operation set value With a creation device,
Operating the CPU unit program simulation program and the special unit simulation program ;
A programmable controller simulator characterized by the above.   A special unit that expands the function of the CPU unit of the programmable controller, and the request is written by the I / O request processing by the CPU unit, and the written request is read by the I / O response processing by the special unit, A computer-executed method for creating a special unit simulation program for simulating the operation of the special unit having a buffer memory in which a response corresponding to the read request is written in the I / O response processing. ,
  The type of special unit executed by the information acquisition unit included in the computer, I / O allocation information for allocating the buffer memory to the memory space of the CPU unit, and an operation setting value set in the special unit Step to get the
  Creating the special unit simulation program based on the type of special unit acquired by the information acquisition unit, the I / O allocation information, and the operation setting value, which is executed by the generation unit included in the computer;
  A method comprising the steps of:

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