WO1989011686A1

WO1989011686A1 - System for making reference to signals of a pc unit

Info

Publication number: WO1989011686A1
Application number: PCT/JP1989/000399
Authority: WO
Inventors: Nobuyuki Kiya; Yasushi Onishi
Original assignee: Fanuc Ltd
Priority date: 1988-05-19
Filing date: 1989-04-12
Publication date: 1989-11-30
Also published as: JPH01292402A

Abstract

A system for making reference to input and output signals and internal relay signals of a PC (programmable controller) unit. A user program (10) is stored in a RAM (6). Instruction of the user program consists of an operation portion that indicates the type of instruction, an address portion, and an addressing mode portion for designating a reference mode. By indirectly making reference to the addressing mode portion, the user program (10) can be easily changed even when correspondence is changed between the relay address and the hardware terminal

Description

Specification

Pc device signal reference method

The present invention refers to a programmable controller (hereinafter, referred to as Pc). In particular, the state of a relay and a coil of a machine tool are input to a PC as signals, and the signals are calculated according to a program. The present invention relates to a signal reference method for a PC that outputs a calculation result and controls a machine tool. Background technology

In a conventional machine tool control method using a PC, a signal line is connected to each input / output signal terminal to input and output external signals corresponding to relay and coil states. According to these signals. When referring to these signals in the C program, for example, the I terminal of the input terminal is the symbol I 1, the 1 terminal of the output terminal is the symbol Q, and so on. References are made using symbols that correspond one to one.

However, it is not easy for such conventional methods to respond to small-scale changes that are often required in system development and maintenance. In other words, even if the signal connecting terminal is changed at only one place, the program is being programmed! : All instructions must be searched and many instructions must be changed. example For example, it is necessary to change all symbols I 1 in the program to I 2. If the program is stored in R0M, it takes time to change it, and it is not easy to change it on site.

Disclosure of the invention

The present invention has been made in view of such a problem, and has improved flexibility in creating and changing a user program.

An object of the present invention is to provide a PC signal reference method.

In the present invention, in order to solve the above problems,

In the signal reference method of the PC device, which refers to the input / output signals of the PC (programmable controller) device and the internal ray signal, the operation section indicating the type of instruction and the relay referenced by the instruction. Stores, in a memory, a program including an instruction code including an address portion indicating an address of a coil and an addressing mode portion indicating a reference mode, and stores the program in a memory. The above-mentioned program is sequentially read from the memory, and if the address mode part of the read program instructs direct reference, the relay specified by the address part in the instruction code is also performed. When the addressing mode part indicates indirect reference, the coil refers to the register indicated by the address part in the instruction code, and the reference is made to the register referred to. Stored The signal reference method of the PC device, which specially uses the relay or coil indicated by the

Be flooded

The PC may be a ΓC built in the NC device ::, In addition, a stand-alone PC may be used.

Microprocessor for PC (hereinafter referred to as CPU). When interpreting and executing the π-gram one step at a time, first, reference is made to the forces that are bit forces 1 and 0 that constitute the addressing mode section.

For example, if the bit is 0, the signal having the address stored in the address §β in the instruction is used for the operation, and if the bit power is 1, the signal in the instruction is used. The contents of the register having the address stored in the address section are referred to, and the signal having the value stored in this register as the address is used for the operation. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of hardware for implementing the signal reference method of the PC device of the present invention,

Fig. 2 is a block diagram of the instruction code of the user program.

FIG. 3 is a code showing the types of instructions corresponding to the operation part.

Fig. 4 shows the code table of the address section.

FIG. 5 is an example of a user sigma program. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a hardware block diagram for implementing a signal reference method of a PC device of the present invention. .

PC 1 is composed of CPU 2, input circuit 3, output circuit 4 and R 〇 M 5 And RAM 6, an interface 7 for a program creation device, and a bus 8. R 0 M 5 stores the system program 9. RAM 6 is battery-knocked out, and can be programmed by user program memory 10, input relay memory 11, output calibration memory 12, internal relay memory 13, and register memory. Used as 1.

The program creation device 15 has a liquid crystal display device 16 and a keyboard I 7 and is connected to the interface 7 _c

Fig. 2 shows the structure of the instruction code of the user program. The user program memory 10 has a 16-bit 1-mode configuration unit, and one level corresponds to one step of an instruction. As can be seen from Fig. 2, the structure of one word representing the instruction step consists of a 4-bit operation section, a 1-bit addressing mode section, and an 11-bit address section. Less part. When the addressing mode part is 0, the signal of the address part is directly referred to-, and when the addressing mode part is】, the contents of the register specified by the address city are referred to. E 311. Operation Instructions corresponding to the four bits of the instruction part-The code indicating the type is shown below.

Fig. 4 shows a code table showing details of the address section. The address part indicates the address of the data used for the operation. The upper two bits indicate the type of memory to be referred to, and the lower nine bits indicate the bit number.

Fig. 5 shows an example of a user program. Here, from address 0 to address 2, the addressing mode Si is 0, so all of them are direct reference instructions, while the address From address 3 to address 5, the addressing mode part is 1 most, and therefore all are instructions for indirect addressing. For example, if the contents of register R 1 are 1, the contents of register R 2 are 2, and the contents of register R 3 are 2, the instructions from address 3 to address 5 are: This indicates that the logical product of the signal of II and the signal of 12 should be output to Q 2. If it is necessary to change the output to Q2 to the logical product of the signal of I3 and the signal of I4, the content of the register R1 is changed from 1 to 3, and Change the contents of register R 2 from 2 to 4. Even when the same signal is referenced in many steps, the program does not need to be changed, only the register memory 14 needs to be changed. For example, if the data of the counter is input to the register memory 14, the signal to be read at the time of executing the program can be changed by indirectly referring to the register memory 14.

Although the liquid crystal is used as the display device 16 in this embodiment, a CRT display device may be used.

As described above, in the present invention, instead of storing the address of the signal directly in the user program memory of the PC device, the address of the register memory is stored, and the read register memory is stored. Since the configuration is such that the address of the signal to be used for the operation can be determined according to the content of the instruction, there is no need to search and change all the instructions when changing the address of the signal to be used. It is only necessary to change the contents of the system memory.

Also, if you input the counter data etc. to the register memory: The signal to be read can be changed during program execution.

Therefore, the flexibility in creating and modifying a user program can be greatly improved.

Claims

The scope of the claims

1. In the signal reference method of the PC device, which refers to the input / output signals and internal relay signal of the PC (programmable controller) device,

An operation section indicating the type of instruction, an address section indicating the relay or coil address referred to by the instruction, and an addressing mode section indicating the reference mode are provided. A program consisting of instruction codes stored in memory,

The program is sequentially read from the memory,

If the above-mentioned addressing mode section of the read program directs reference, the relay or coil indicated by the address section in the instruction code is used for calculation. use,

When the addressing mode section indicates an indirect reference, the register indicated by the address section in the instruction code is referred to, and the relay indicated by the value stored in the referred register is referred to. A signal reference method for a PC device, characterized in that a coil is used for calculation.

2. The signal reference method for a PC device according to claim 1, wherein the PC is a PC built in an NC device.

3. The signal reference system for a PC device according to claim 1, wherein the PC is an independent PC.