JPH046963B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sequence debugging device, and more particularly to a sequence debugging device that writes a sequence program into a sequence control device, reads a sequence program from a sequence control device, and further monitors operating conditions. It is something.

Conventionally, the following methods are known as methods used to debug a sea case program written in a sequence control device.

The first method is to
This is a method using a so-called ON-OFF state monitor that displays ON-OFF states. The second method is
This is a so-called forced input method in which the external input section and the input data storage section of the sequence control device are separated, the ON-OFF state is written directly from the peripheral device to the input data storage section, and a simulated operation is performed using the input.

FIG. 1 is a block diagram showing the configuration of a conventional sequence control device and sequence creation/debugging device.

The sequence control device 1 includes an external input section 3 to which an external signal is input, and an input section for storing input data from the external input section 3 according to a control signal from a sequence creation/debugging device (hereinafter simply referred to as a debugging device) 2. a data storage unit 4; a central calculation unit 5 that performs calculation processing on input data;
It consists of a program storage section 6 that stores programs to be executed, an output data storage section 7 that stores data to be output as a result of arithmetic processing, and an external output section 8 that outputs signals to the outside.

On the other hand, the debugging device 2 includes an operation section 14 that is manually operated by an operator or the like, a control section 15 that issues control signals for controlling each part of the debugging device based on operation signals from the operation section 14, and an input data storage section 4. and an address register 16 for setting the address of the program storage section 4, and a prohibition register that generates a prohibition signal based on a control signal from the control section 15 to prohibit data input from the external input section 3 to the input data storage section 4. A signal generation section 17, a data input/output section 9 that inputs and outputs data to and from the input data storage section 4 and the output data storage section 7, an object/ladder conversion section 10, a ladder/object conversion section 11, and a reflex section that stores display data. It is composed of a refresh memory 12 and a display section 13 that displays data in the refresh memory 12.

Now, when debugging a sequence program, input NO as an address is given from the address register 16 to the input data storage section 4 according to a specification from the operation section 14, the specified input data is read out, and the data is displayed on the screen of the display section 13. Display ON-OFF status. Further, the external input prohibition signal generating section 17 generates a prohibition signal to prohibit the input of input data from the external input section 3 to the input data storage section 4, and the input NO and input data are designated from the operation section 14, By forcibly writing into the input data storage section 4, calculations are performed using the set simulated input, and the operation of the sequence program is checked and debugged. This operation input procedure is shown in FIG. In this type of forced input monitor, for example, specified input
ON- when XO is forcibly set to “1”
An example of the monitor in the OFF state is shown in FIG. The XO contact is closed and displayed with high brightness.

In this way, in conventional debugging methods,
It is possible to check the ON-OFF status or check the operation of only one part of the sequence program with a simple simulation operation. However, in debugging using forced input, it is necessary to disconnect the external input, so it is recommended to manually set the input for one part of the sequence program and check the operating status in the actual operating state with all external inputs taken in. I couldn't do that. Additionally, since arithmetic processing takes priority during operation, it was not possible to forcibly turn ON and OFF only specified outputs to check the movement of the sequence or the movement of external equipment.

The purpose of the present invention is to eliminate the drawbacks of the prior art as described above, to make it possible to check the operating state by manually running a part of a sequence program in a simulated manner, and to forcibly output an output during operation. ON−
An object of the present invention is to provide a sequence debugging device that can be turned off and its operating status checked.

Thus, the present invention can equivalently close all the contacts up to a predetermined position in the sequence by forcibly setting the intermediate result of the calculation to "1" or "0", or The operating condition can be checked by disconnecting the wire at the position. In other words, the sequence control device has an arithmetic accumulator that stores intermediate results of arithmetic operations, but there is an instruction to ignore the previous arithmetic results and load "1" or "0" into this accumulator. and the debugging device includes an address converter that converts a specified position on the sequence, that is, a position specified by the cursor of the sequence displayed on the display unit, to an address on the program storage unit, and A code generating section is provided for generating the code of the instruction, and the code at a predetermined position is replaced with the code from this code generating section.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 is a block diagram showing the configuration of a sequence control device and a sequence creation/debugging device according to an embodiment of the present invention. In addition, in Figure 4,
The same parts as in FIG. 1 are given the same reference numerals.
A feature of this embodiment is that it is possible to specify from the operation unit 14 that all contacts up to a certain position in the sequence should be in the closed state. Furthermore, compared to the one shown in FIG. 1, this embodiment has an address translation section 21 and an operation code generation section 22. The address conversion section 21 calculates the absolute address of the cursor on the display section 13 in order to address a designated position on the sequence within the program storage section 6. The output of the address conversion section 21 is given to the address output section 16, which specifies an address for storing the operation code in the program storage section 6. Operation code generator 2
2 generates an operation code for forcibly rewriting the accumulator of the central processing unit 5 to "1" or "0". The generated operation code is sent to the data input/output section 9 and forces the accumulator to be "1" or "0".

Next, the operation will be explained according to the operating procedure shown in FIG. For example, a sequence like the one shown in FIG. 6a is displayed on the display section 13, and the
Assume that you specify the position where you want POWER to conduct (the position where you want all contacts up to that point to be closed) by moving the cursor. First, from the operation section 14
When POWER/ON or OFF is specified, the address converter 21 moves to the position in front of the cursor (in Fig. 6).
_X1 contact position) is calculated, the corresponding operation code in the program storage unit 6 is saved, and the accumulator generated by the operation code generation unit 22 is forcibly set to “1”.
Or rewrite the operation code to "0". Figure 6b shows the operation code of contact _X1 , which forces the accumulator to “1”.
This is equivalent to shorting the bus bar after the _X1 contact with the shorting wire 31 as shown in c.
A computation result equivalent to when all contacts before X ₁ are closed is obtained. That is, this is because the contents of the accumulator that held the intermediate calculation results up to _X1 were changed to "1".

FIG. 7 is a diagram functionally showing the sequence shown in FIG. 6 above. Functionally, this is equivalent to inserting the changeover switch 32 at the position on the sequence designated by the operation unit 14. For example, if you specify POWER OFF from the operation unit 14 and rewrite the X1 contact to an operation code that sets the accumulator to "0", functionally the selector switch 32 is connected to the OFF side, and the X1 contact
The connection between and X2 is disconnected. Of course, it is clear that the situation described above will be reversed when a certain contact point is turned on by the operation unit 14.

FIG. 8 is a diagram showing another example of operation of this embodiment. This shows an example in which a branching contact of the OR circuit, for example, X5, is designated. As shown in a, in the calculation process, X0, X1, X2, X3
The calculation results up to this point are saved at the time of branching. Here, if the accumulator is set to "0" or "1" when executing the X5 contact, b
As shown in FIG. 3, a changeover switch 33 is equivalently inserted only on the branch side.

Therefore, if you bring the cursor just before the output coil and perform the same operation as above, all the calculation results up to that point will be "0" or "1", so you can easily Turns the specified output ON-OFF
You can.

Furthermore, at the end of this operation, the rewritten operation code can be returned to the original operation code that was saved.

As explained above, according to the present invention, by forcibly setting the intermediate result of the calculation to "1" or "0", all contacts up to a predetermined position in the sequence are equivalently closed or disconnected. can do. This makes it possible to manually or forcibly move one part of the sequence during operation to confirm the operating state. Furthermore, by combining the sequence control device with external equipment, the efficiency of debugging can be further improved.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the configuration of a conventional sequence control device and a sequence creation/debugging device, Fig. 2 is a flowchart showing a conventional forced input operation procedure, and Fig. 3 is a diagram showing an example of monitoring during forced input. , FIG. 4 is a diagram showing the configuration of a sequence control device and a sequence creation/debugging device according to an embodiment of the present invention, and FIG. 5 is a flowchart showing an operating procedure for explaining the operation of an embodiment of the present invention. Figure, 6th
The figure shows an example of a monitor, and FIGS. 7 and 8 are sequence functional diagrams. 1 is a sequence control device, 2 is a sequence creation/debugging device, 14 is an operation section, 21 is an address translation section, and 22 is an operation code generation section.

Claims (1)

[Claims] 1 A display section that displays a sequence, and a configuration configured to convert the position specified by a cursor of the sequence displayed on the display section into an address on the sequence program stored in a program storage section in the sequence control device. generates an operation code for forcibly setting the contents of the address conversion unit and the accumulator that constitutes the calculation unit of the sequence control device and stores intermediate results of calculations to “1” or “0”. The present invention has a code generation means configured as follows, and is configured to replace the code of the sequence program located at the address specified by the address conversion section with the operation code from the code generation means. Characteristic sequence debugging device.