GB/T 40329-2021 in English
VALIDElectrical equipment and system of industrial machines—PLC programme in numerical control system
- Issued on:2021-08-20
- Implemented on:2022-03-01
- File Format:PDF
- Delivery:Via email within 5 business days
$418.00
《GB/T 40329-2021工业机械电气设备及系统 数控PLC编程语言》由TC159（全国自动化系统与集成标准化技术委员会）归口，TC159SC1（全国自动化系统与集成标准化技术委员会物理设备控制分会）执行，主管部门为中国机械工业联合会。
Introduction
Interpretation of the core content of the standard
| Programming language | Applicable scenarios | Syntax features |
|---|---|---|
| Sequential Function Chart (SFC) | Process control | Step conversion mechanism |
| Instruction List (IL) | Underlying logic implementation | Line-based instruction structure |
| Function Block Diagram (FBD) | Modular programming | Graphical interface |
Key technical requirements
Chapter 6 of the standard clearly defines the technical specifications of three types of special function blocks:
- Machine tool turret instruction function block: supports T code decoding and tool status monitoring
- Feed override IO function block: realizes dynamic adjustment of override parameters
- Tool magazine instruction function block: provides tool position management and tool change control
Implementation suggestions
According to the programming model requirements of standard 4.2, it is recommended to adopt a layered development strategy:
- Basic layer: Build a data type system according to GB/T15969.3
- Middle layer: Develop a standard function block library
- Application layer: Organize the process flow through SFC elements
In a typical application scenario, the PLC program of a CNC lathe should include:
1. Spindle control function block2. Tool holder management function block3. Safety interlock logic
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