ISO 4342:1985

Name: ISO 4342:1985 — Numerical control of machines — NC processor input — Basic part program reference language
SKU: ISO 4342:1985
Price: 500400 RUB
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Numerical control of machines — NC processor input — Basic part program reference language

Название (английский):

ISO 4342:1985

Numerical control of machines — NC processor input — Basic part program reference language

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 278
Дата публикации:: 19 декабря 1985 г.
Издание:: ISO IS 4342 edition 1 version 1
ICS:: 25.040.20

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Описание (английский):

Defines a higher-level symbolic part-programming language which is processed by a digital computer to produce a NC machine program. Annex A gives rules for representing the RL on punched cards; annex B contains syntax description on the reference language; a list of recommended synonyms is given in annex C; annex D includes an alphabetical list of major words and locations.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 4342:1985 - "Numerical control of machines - NC processor input - Basic part program reference language" defines a higher‑level, symbolic reference language (RL) for writing part programs that are processed by a computer to produce NC (numerical control) machine programs. Developed primarily for CNC machine tools, the standard specifies language structure, semantics and conventions for creating processor input that a postprocessor converts into machine‑specific CLDATA (cutter location data). Annexes provide practical representation rules and formal syntax: Annex A (punched‑card format), Annex B (syntax description), Annex C (recommended synonyms) and Annex D (word/location index).

Key topics and technical requirements

Language scope and purpose: A problem‑oriented, symbolic part‑programming language similar to scientific programming languages but tailored to machining and NC programming.

Processor / postprocessor model: Two‑stage processing - a processor handles the RL and a postprocessor generates machine‑specific NC output (CLDATA). ISO 3592 is cited as the primary reference for CLDATA.

Coordinate system: Right‑handed Cartesian system with reference axes X, Y, Z related to the workpiece; angles expressed in degrees and decimals; cutter reference point conventions are defined.

Data types and arithmetic: Entities are numeric (real values with integer and fractional parts) or symbolic; RL supports arithmetic operators, functions and expressions. The standard clarifies semantics (e.g., no implicit type associations).

Language elements: Definition of letters, digits, special characters, literal strings, identifiers, labels, statements, nesting (including the facility to define entities using parentheses), and part program structure.

Geometrical and motion statements: Extensive logical pages cover geometrical definitions (points, lines, circles, planes, surfaces, matrices, etc.), motion and toolpath control, tool orientation, and related execution statements.

Implementation guidance: Annex B provides a formal syntax to assist implementers; Annex A gives representation rules for legacy media (punched cards).

Applications and users

ISO 4342 is useful for:

CNC programmers and CAM developers creating higher‑level part programs or processor input.

Postprocessor and NC software vendors implementing CLDATA generation consistent with the RL.

Machine tool manufacturers and integrators standardizing processor interfaces and toolpath semantics.

Automation engineers and systems integrators concerned with interoperability between workshop‑level systems and NC controls. Because the RL is a reference language, organizations typically implement subsets or modules to match specific machine capabilities.

Related standards

ISO 3592 (CLDATA / processor output)

ISO 841 (coordinate system nomenclature)

ISO 4343 (processor output minor elements)

ISO 646 (character set)

Keywords: ISO 4342:1985, numerical control, NC processor input, reference language, part program, CLDATA, CNC programming, postprocessor, language syntax.

ISO 4342:1985

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

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