JPH01244501A - Pc trace control system - Google Patents

Abstract

PURPOSE:To easily trace a signal, to facilitate recognition of the time elapse of the signal and to shorten the debugging time by providing a source program with a trace function to trace the required signal. CONSTITUTION:With respect to the trace function, instructions of program numbers 21 and 22 are added for trace in a source program 5 generated in the PASCAL language. The instruction of the program number 22 is the trace function, and I is the number of signals to be traced and TR designates the signal to be traced. The instruction of the program number 21 indicates that the signal designated by the trace function is A. Then, the signal A is traced and results are stored in a trace area. The trace function including the signal to be traced and the number of signals to be traced is designated to the source program of a PC generated in a high level language, and the signal is traced, and results are stored in the memory and are displayed. Thus, it is unnecessary to generate or add a special program for trace.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a PC trace control method for debugging a user program of a PC (programmable controller 1 to a controller), and in particular a trace function for tracing signals. This invention relates to a trace control method for a PC equipped with a PC.

[Conventional technology]

When debugging a user program on a PC (programmable controller), in order to check the operation of the user program, there is a function that displays the currently executing instructions on the source program, and a process that stores necessary signals in memory. Adding.

This is especially necessary when the user program is a high-level language such as the Pascal language, since there is no correspondence between the source program and the objects 1 to 1 through the program.

[Problem to be solved by the invention] However, if a large number of such confirmation programs are added to a source program, it takes time to delete them after the user program is completed, and errors may occur when deleting them. There is a possibility.

Furthermore, even if data to be confirmed is stored in memory, it is generally difficult to understand the process of signal change over time.

The present invention has been made in view of these points, and it is an object of the present invention to provide a trace control method for a PC provided with a trace function for tracing signals.

[Means for Solving the Problems] In order to solve the above problems, the present invention uses a high-level language in a trace control method for I'C (Programmable Controller), which is used to dehasoglog a user program of C (Programmable Controller). A PC trace control that instructs the PC source created by Progera 1 to trace a function including the signal and number to be traced, traces the signal, stores it in memory, and displays the signal. method provided.

[Effect]

The I-race function added to the source program traces the specified signal, stores it in memory, and displays it. Therefore, there is no need to create or add a special program for tracing.

(Example〕 DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below.

FIG. 1 shows a block diagram of the hardware of a PC (programmable controller) on which the present invention is implemented. In the figure, 1 is an iJ program creation device, 2 is a display screen, and a CRT, liquid crystal display, etc. are used. The specified trace signal is displayed on the display screen 2.

3 is a function key, and 4 is an operation key.

10ba PC (7' programmable controller), 11
is a processor that controls the entire PC. 12 is an input circuit that receives a signal from the outside, converts the signal level, and transmits it to the lotus. 13 is an output circuit, which outputs an internal output signal to the outside.

Reference numeral 20 denotes a ROM, in which a management program 21 for managing the execution of user programs, a user program 22 written in Pascal language for controlling machine tools, etc. are stored.

30 is a RAM, in which various data are stored;
Input signals, output signals, auxiliary relay signals, and internal register signals are also stored here.

40 is an interface for the program creation device;
This is an interface circuit that connects the lotus and the programming device.

FIG. 2 shows an example of a 1-race function. In the figure, 5 is a source program created in Pascal language. 5
a is the program number of the source program, and program number 20.23 is a normal source program.

Program numbers 21 and 22 are instructions added for tracing.

The command with program number 22 is a trace function, where 1 is the number of signals to be traced and 1'R is the designation of the signal to be traced. The instruction with program number 21 is an instruction that specifies that the signal specified by the trace function is A. As a result, signal A is traced and stored in the trace area.

FIG. 3 shows an example of displaying traced signals. 6 is a display screen, 6a is a sequence number, 22 is a program number of a source program to which a trace function is specified, and 6c is a state of signal A.

That is, it can be clearly seen that the signal A changes to 0.2.4.

In the above explanation, the source program was explained in Pascal language, but it can be similarly applied to other languages. Further, even in a program created in a language such as a ladder program, necessary signals can be similarly traced using macro instructions that define a trace function.

(Effects of the Invention) As explained above, in the present invention, a trace function is provided in the source program and the necessary signals are traced, so that the signals can be easily traced.
It becomes easier to understand the time course of signals, and debugging time is also shortened.

[Brief explanation of the drawing]

Figure 1 is a block diagram of the hardware of a PC (programmable controller) for implementing the present invention, Figure 2 is a diagram showing an example of a trace function, and Figure 3 is a diagram displaying traced signals. . 1-----------Program creation device 2--
−−−−−−−−Display screen 3−−−−−−−−・Function key 4−−−
--------- One operation key 5 ------------ Source program 6 ---
------------Display screen 10------------PC (programmable controller) 11------------Processor 12--
−−−−−−−−−−−One input circuit 13−−−−−−−−
---Output circuit 20--=----- ROM 21------- Management program 22--
------------User program 30----
------------ RA M40----
−−−−−−−−−Interface patent applicant Fanuc Co., Ltd. agent Patent attorney Koganaka Hattori 3M 2M

Claims (2)

[Claims] (1) In a PC trace control method for debugging a PC (programmable controller) user program, a trace function containing signals and numbers to be traced is commanded to a PC source program written in a high-level language, and A PC trace control method that traces signals, stores them in memory, and displays the signals. (2) The trace control method for a PC according to claim 1, wherein the high-level language is a Pascal language.