JPH01152506A - Editing system for ladder program - Google Patents

Abstract

PURPOSE:To practice the substitution of a signal address without errors by substituting the address corresponding to a symbol name by giving priority to the symbol for the signal to give the symbol. CONSTITUTION:In a ladder program, 1 and 2 are the logical contacts of a relay, and 3 and 4 are logical coils. A symbol is given to each point, the symbol of a contact 1 is an STO, the symbol of a contact 2 is an SPO, the symbol of a coil 3 is ST and the symbol of coil 4 is SP. 5 is the address of a signal before substituting, and 6 is the address of a new signal after substituting. The signal to give the symbol STO is the address X0.1 before changing, and in a new program after changing it is X0.5. To substitute the address of the signal like this, by assigning the new address to the symbol STO, the substitution of the address is practiced. Thus, the address of the signal can be substituted without errors.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a ladder program editing method, and more particularly to a ladder program editing method that allows easy conversion of signal addresses.

[Conventional technology]

In a PC (programmable controller), if the detailed specifications of the machine tool to be controlled are changed, the ladder program, which is the control program, must also be changed. However, in reality, the functions of many signals remain the same, but the addresses of the signals are often changed. In such cases, the programmer (
The program creator had to convert the signal addresses one by one.

[Problem that the invention seeks to solve]

However, converting such a ladder program is a very monotonous task, and since it is simply a conversion of numerical values, it takes a considerable amount of time, and there is a high probability that errors will occur.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a ladder program editing method that allows easy conversion of signal addresses.

[Means for solving problems]

In the present invention, in order to solve the above problems, in a ladder program editing method that converts the address of a signal in a ladder program, signals to which the symbol is attached are given priority and correspond to the symbol name. By replacing the address,
A ladder program editing method is provided, which is characterized in that the address of the signal is replaced.

[Effect]

Use the symbol attached to the signal to specify a new address based on the symbol. As a result, instead of simply converting numbers, addresses can be replaced using symbols as indexes.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

FIG. 1 shows an example of a ladder program according to an embodiment of the present invention. In the figure, 1 and 2 are the logical contacts of the relay, and 3 and 4 are the logical coils. Each contact has a symbol, the symbol for contact 1 is 5TO, the symbol for contact 2 is 5PO, the symbol for coil 3 is ST,
The symbol of coil 4 is sp.

FIG. 2 shows a diagram for explaining address replacement. In the figure, 5 is the address of each signal before replacement, and 6 is the address of the new signal after replacement. In machine tools, it is often necessary to create a ladder program in which the addresses of such signals are changed due to changes in detailed specifications. As shown in the figure, the signal with the symbol STO has addresses 'XO, IJ before the change, but in the new program after the change, it has the address 'X0.5J. The same applies to other signals.

To replace the address of such a signal, a new address is specified for the symbol STO and the address is replaced. Specifically, when the amount of conversion is small,
Specify this new address on the screen of the program editing device. Also, if there is a large amount of signals to be replaced, store the corresponding symbol and address data separately on a floppy disk and convert it. .

After replacing the addresses, this is compiled into an object program and used as an actual control program.

FIG. 3 shows a configuration diagram of a PC (programmable controller) for implementing the present invention. In the figure, 11 is a processor that controls the entire PC (programmable controller). An input circuit 12 receives a signal from the outside, converts the signal level, and transfers it to the bus.

13 is an output circuit, which outputs an internal output signal to the outside. 20 is a ROM, which contains a management program 21 for managing the execution of ladder programs (control programs) and a ladder program 2 for controlling machine tools, etc.
2nd prize is stored.

30 is a RAM, in which various data are stored;
Symbols and address data for each signal are also stored.

41 is an interface for a program editing device;
This is an interface circuit for connecting a bus and a program editing device. 42 is a program editing device;
It is a device for creating and debugging the ladder program 22, and 42a is a display screen and 42b is a keyboard. When there are few signals whose addresses should be changed,
It can be changed using this display screen 42a and keyboard 42b.

In the above description, address replacement is performed using a program editing device connected to a PC (programmable controller), but it can also be performed using an offline program creation device separate from the PC.

〔Effect of the invention〕

As explained above, in the present invention, the address of a signal is replaced based on the symbol, so that the address of a signal can be easily replaced without error.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an example of a ladder program according to an embodiment of the present invention, Fig. 2 is a diagram for explaining address replacement, and Fig. 3 is a diagram showing a PC (programmable controller) for implementing the present invention. FIG. 1.2--------・-- Contact 3.4-- Coil 5------------ Diagram showing the symbol and address before change 6-...--...--Figure 11 showing symbols and addresses after change--...--Processor 12--
−・−・・−・・−Input circuit 13−−−−−−−1・−Output circuit 20−
・−・・−−−−−、R0M21−・・−・−・−・・
−Management program 22−−−−−・・・・−−−−−・
Ladder program 30---------・----・-, R
AM42----------Program editing device patent applicant Fanuc Co., Ltd. agent Patent attorney Takeshi Hattori Figure 1 Figure 2

Claims (1)

[Claims] (1) In the ladder program editing method that converts the address of a signal in a ladder program, signals with a symbol are given priority by replacing the address corresponding to the symbol name.
A ladder program editing method characterized by replacing the address of the signal.