JPS62278607A - Numerical controller - Google Patents

Abstract

PURPOSE:To store a larger quantity of working programs into a nonvolatile external memory of the same capacity by compressing the information on each block of a working program. CONSTITUTION:The 26 alphabetic characters A-Z are prepared and A and B, for example, are coded into '0' and '1' respectively. Thus the characters A-Z can be expressed in 5 bits, that is, an address word can be shown in 32 bits in all by allocating 5 bits to an alphabetic character part with 27 bits allocated to a numeric part respectively. Here 32 bits equal to 4 bytes, e.g., four characters and therefore the 27 bits of the numeric part are divided to show an integer part in 16 bits and a decimal part in 11 bits. Thus the address word can be expressed in X-32768.999-X32767.999. For EOB the alphabetic character part, for example, is defined as EOB=11111 for discrimination from the normal address words.

Description

[Detailed Description of the Invention] 6. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method of storing a program in a numerical control device.

[Conventional technology]

FIG. 2 is a system broadcast diagram of the numerical control device.

In the figure, (1) the central processing unit (hereinafter referred to as 1cPU) that controls the entire fl system; (2)
(4) is the input/output (Ilo) interface device; ) is a paper tape manual device, (6) is a servo motor positioning control Jt
This is a servo interface that is designed to be used.

Next, the operation will be explained. Numerical control device c below this t
-N C) is usually punched on paper tape, and the paper tape input device (5
) and ■ interface (4) t-, and is stored in the non-volatile external memory (3). Paper tape here
The system control program is pre-stored in the memory 1J[1t(2)] during the procedure for reading and storing the next information in the non-volatile external memory (3). CPU (1)
By executing this system program (i-1'4), the processing program is read character by character from the paper tape, and all the information obtained from this 5 fl is transferred to the non-volatile external memory (3) and stored in the processing program. Here, the word address method is adopted as the format of the machining program.One side nib program is composed of multiple blocks, and the maximum trowel of each block is determined by the gOB code.几, each block is composed of a repeating number of address words. Each address word starts with one of the alphabetic characters A to 2, and the numerical information following this alphabetic character is a sequence of multiple digits. Only one decimal point is allowed in a sequence of numbers, and negative numbers are also allowed.

Usually up to 6 digits after the decimal point are valid.

Next, an example of an address word is shown.

X 123.456 B -24,8 Below is an example of a block.

GOD X123. d56 Z7B9 108MO
2goB On the Gion tape, the processing program is 1 according to the above format.
Punch out characters one by one. Note that at the end of the entire machining program, the EOR code is punched out to j&t&.

Next, an example of a machining program is shown.0GOOX100. OOYloo, 00 EOBGOl
Z-200,Floo 108MO2FJOB OR FIG. 3 is a flowchart for storing an iqm program into an external memory. First, step CD
Inputs all characters one by one from the paper tape at step 32, and then performs blue filling until FOR is input to the external memory (steps 32 and 338).

[Problems that the invention attempts to solve]

Conventionally, the processing program on the paper tape is stored in a non-volatile external memory in the same format as the above-mentioned processing program.
A memory capacity t of A8 bits is required for alphanumeric characters, f20d, and EOH. Therefore, in order to store them in one machining program,
A memory capacity of +11 x 8 bits is required.

This invention is proposed for storing one machining program in a non-volatile external memory capacity that is less than 7, and aims to improve the usage efficiency of the conventional storage method VC comparison memory. do.

[Problem t#! tth means to decide]

2) By compressing the information in each block of the Niprogram, it is possible to store a more prolific machining program in a non-continuous external memory of the same capacity.

[Effect]

As mentioned above, the address word C is expressed by the first alphabetic character and a sequence of numbers from 0 to 9 (one decimal point is specified), but by converting each address word to 2m format, data compression 182 is performed. [Embodiments of the Invention] Hereinafter, an example of the present invention will be explained with reference to the drawings. al
! 11 is a flowchart for realizing this invention. In other words, in step αυ, write one character at a time from the tape, and if this is an alphabetic character, create an address word, and in step (g), use the atto V password compression conversion trowel. Transfer the compressed data to 7. EOBt - Man-powered 4th meeting, block break? For clarity, output the EOB code to non-volatile external memory (see step 21.22).

The address word compression method will be specifically explained below.

There are 26 English letters from A to 2, and they are coded as 0 for person and 1 for B, respectively. For example, the code for 2 becomes 25.

Therefore, 2''& from A can be expressed in 5 bits.

That is, A=00000. B=00001. ...fist, P=
01111.・φ...Z=11[]Q1. Therefore, 5 bits are assigned to the alphabetic character part, 27 bits (k11) are assigned to the numerical part, and the address word is expressed using 32 bits. There are 4 bits in 32 bits, and this is further divided into 27 bits "It" which is a 0 number part which becomes 4 characters, and the integer part is represented by 16 bits and the decimal part is represented by t11 pits.

With this method, the integer part can be expressed from -62768 to 32767, and the decimal number a can be expressed from -0,999 to 0.999t-. Therefore, as an address word,
52768,999-X327. It is possible to express 1S7.999. For gOBlcljA, for example, if the English character part 1EOB=11111, it is possible to distinguish it from a normal address word.

Below, some examples are shown in 16-letter notation.

X100.1 → 0803 2064A -1,0
→ C17FF F'8QO address word = English character code + 2a numerical value (integer part and decimal part) [Effect of the invention] As described above, according to this invention, the NCoIXJ program address word can always be expressed in 62 bits. Therefore, it is now possible to store many tons of nibograms in a nonvolatile external memory of the same capacity. In addition, since all information in one nib program is converted into binary data and stored, N
There is no need for further binary conversion inside C;
High-speed processing of data becomes OT capability.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing the control operation of the present invention, FIG. 2 is a block diagram of the NC, and FIG. 3 is a flowchart showing a conventional method of storing a machining program in a non-intrusive external memory. In the figure, (1) is the CPU, (2> is the memory installed, (3) is the non-random external memory, (4) is the I10 interface,
(5) is a paper tape input device, and (6) is a servo interface. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] In a numerical control device with a built-in non-volatile external memory for storing word-addressed machining programs,
A numerical control device characterized by improving the usage efficiency of non-volatile external memory by compressing and converting word addresses consisting of alphanumeric characters and alphanumeric characters into binary data.