JPH11219209A - Offline simulation device of general purpose plc - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily execute a debug without an actual machine operation by off-line-simulating a positioning program which is generated by means of a user by means of the operation of both simulation output arithmetic parts. SOLUTION: A positioning hard module is excluded from the configuration of a conventional module separation configuration-type general purpose PLC and, then, the simulation output arithmetic part 12 of the positioning hard module and the simulation output arithmetic part 13 of an amplifier and motor speed control system are made to newly stay in a user program area 7 in a CPU module 1. The program for constituting the simulation output arithmetic parts 12 and 13 is inputted from the loader software of a personal computer 11 by a user. The simulation output arithmetic parts 12 and 13 are made to stay in the user program area 7 inside the CPU module 1 so that the off-line simulation without the actual machine is enabled. When the actual machine is operated through the use of a generated user program, the positioning module is connected to a common bus 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a module-separated general-purpose PLC used for positioning control.
The present invention relates to an offline simulation device that supports debugging of a user program.

[0002]

2. Description of the Related Art A conventional general-purpose PLC of a module separation type used for positioning control is configured as shown in FIG. In the figure, 1 is a CPU module, 2
Is a positioning hardware module, and 11 is a personal computer (loader), which are connected by the common bus 3. The CPU module 1 has a built-in processor 4 and its user program area 7 stores a positioning software module 8 created by the personal computer 11. The positioning software module 8 is executed by the processor 4, and the created command data is sent to the bus I / F 5 of the positioning hardware module 2 via the common bus 3. Bus I / F
The command data sent to 5 is input to the positioning LSI 6. The dedicated positioning LSI 6 controls a speed control system including the amplifier 9 and the motor 10 based on the input command data.

[0003]

However, the conventional module-separated general-purpose PL configured as described above is used.
When the user intends to achieve desired positioning control using C, first, the created user program must be debugged in a state where it is actually installed in the machine, which requires a great deal of time and labor. . Further, if it was found that the desired performance could not be obtained after actually starting the operation, it was necessary to redesign.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention of claim 1 is based on C buses connected to each other.
With PU module and positioning hardware module, C
A positioning hardware module is a general-purpose PLC that controls a speed control system consisting of an amplifier and a motor by operating a user-created positioning software module stored in a PU module. A simulated output calculation unit for calculating output data, a simulated output calculation unit for simulating the function of the speed control system to calculate output data, and the simulated output calculation based on the positioning software module stored in the CPU module. Means for executing the off-line simulation by operating the unit.

[0005] A second aspect of the present invention is characterized in that, in the first aspect of the present invention, there is provided means for extracting output data of both simulation output calculation sections and displaying the data on a screen.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the simulated output operation section of the speed control system includes means for approximating the operation of the speed control system by a first-order lag element. And

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the first embodiment. This embodiment is a configuration in which the positioning hardware module is removed from the configuration of the conventional module-separated configuration type general-purpose PLC shown in FIG. 5, and a user program area 7 in the CPU module 1 is newly provided with a positioning hardware module. Simulated output operation unit 12 and amplifier
The simulation output operation unit 13 of the motor speed control system is resident.

[0008] Programs constituting the simulated output calculation units 12 and 13 are input by the user from the loader software of the personal computer 11. These simulation output operation units 12 and 13
Is resident in the user program area 7 in the CPU module 1, thereby enabling off-line simulation without a real machine. When the actual machine is operated using the created user program, the conventional general-purpose PLC shown in FIG.
Similarly to the above, the positioning hardware module is connected to the common bus 3.

FIG. 2 shows the simulated output operation units 12 and 13 of FIG.
It is a block diagram which shows operation | movement. As shown, the input data 21 is input to a positioning module input data operation unit 22 in the positioning software module 8. Here, in the case of actual operation, the data is sent to the positioning hardware module 2 indicated by a broken line in the figure, and the response is returned to the positioning module output data processing unit 23 and output from the module 8 as output data 24. .

However, here, the data output from the input data calculation unit 22 is used for the simulation output calculation unit 12,
13, the operation of the positioning hardware module 2 is reproduced in a simulated manner, and data representing the response is sent to the output data processing unit 23. in this way,
Focusing on the fact that the operation of the speed control system composed of the positioning hardware module 2 and the amplifier and motor can be simulated by a software module, the user program can be debugged without performing actual operation by performing offline simulation. become.

FIG. 3 is a block diagram showing the configuration of the second embodiment. This embodiment adds a function for displaying a trend monitor by incorporating trend monitor display software to the personal computer 11 of the first embodiment shown in FIG. A serial communication line 14 is provided between them. Thereby, the internal calculation data of the CPU module 1 is transmitted to the personal computer 11 via the serial communication line 14 and displayed on the trend monitor. As a result, the user can debug while monitoring the internal calculation data, and the workability at the time of debugging is improved. Since the other configuration is the same as that of FIG. 1, the description of the same part will be omitted.

FIG. 4 is a block diagram showing the operation of the third embodiment. In this embodiment, the simulated output operation unit 13 of the amplifier / motor speed control system in the first embodiment shown in FIG. 1 or the second embodiment shown in FIG. Add the function to approximate as
This is a first-order delay element approximate simulation output calculation unit 15. The operation unit 15 approximates the operation of the speed control system constituted by the amplifier and the motor by a first-order lag element, and makes it possible to perform an off-line simulation with its equivalent time constant being variable. The equivalent time constant can also be obtained by calculation from the inertia of the mechanical system and input. The operation of the other parts in FIG. 4 is the same as that in FIG. 2, and the description of the common parts will be omitted.

In each of the above embodiments, the user
In the user program area 7 in the CPU module 1, the simulation output operation unit 12 of the positioning hardware module and the simulation output operation unit 13 of the amplifier and the motor, which are pre-assured and packaged, are resident, so that the CPU module 1 and the personal computer 11 Offline simulation was realized with only a system configuration. As a result, debugging can be performed without connecting an actual device, and the number of steps for developing a user program can be reduced. In addition, since the performance obtained by the created user program can be confirmed without operating the actual machine, it is possible to eliminate redesign due to insufficient performance.

[0014]

As described above, according to the first aspect of the present invention, since the positioning program created by the user is simulated off-line by the operation of both the simulation output calculation units, the positioning program can be easily executed without operating the actual machine. It becomes possible to debug.

According to the second aspect of the present invention, the output data of both the simulated output calculation units is displayed on the screen, so that debugging of the user program becomes easy.

According to the third aspect of the present invention, since the operation of the speed control system is approximated by the first-order lag element, it is possible to perform an off-line simulation with a variable equivalent time constant of the speed control system.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a first exemplary embodiment of the present invention.

FIG. 2 is a block diagram illustrating an operation of a simulation output operation unit of FIG. 1;

FIG. 3 is a block diagram illustrating a configuration of a second exemplary embodiment of the present invention.

FIG. 4 is a block diagram illustrating an operation of a third exemplary embodiment of the present invention.

FIG. 5 is a diagram showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CPU module 2 Positioning hardware module 3 Common bus 7 User program area 8 Positioning software module 11 Personal computer 12 Simulation output operation part of positioning hardware module 13 Simulation output operation part of amplifier / motor speed control system 14 Serial communication line 15 Primary Delay element approximation simulation output operation unit 21 Input data 22 Positioning module input data operation unit 23 Positioning module output data processing unit 24 Output data

Claims (3)

[Claims] 1. A speed control comprising an amplifier and a motor having a CPU module and a positioning hardware module connected to each other via a bus, wherein the positioning hardware module is operated by a user-created positioning software module stored in the CPU module. General-purpose P for controlling the system
A simulated output operation unit that simulates the function of the positioning hardware module and calculates output data, is a simulated output operation unit that simulates the function of the speed control system and calculates output data, Means for executing the off-line simulation by operating both of the simulation output operation sections based on the positioning software module stored in the off-line simulation module. 2. The general-purpose PLC off-line simulation apparatus according to claim 1, further comprising: means for extracting output data from both of the simulation output operation units and displaying the data on a screen. 3. A general-purpose PL according to claim 1 or 2.
C. An off-line simulation apparatus of C, wherein the simulation output operation unit of the speed control system is provided with means for approximating the operation of the speed control system by a first-order lag element.
C offline simulation device.