Siemens S7-300 and S7-400 STL Reference Manual

About this manual

This document is a reference manual for the Statement List (STL) programming language designed for use with Siemens SIMATIC S7-300 and S7-400 programmable controllers. It serves as a guide for creating user programs in STL and includes detailed descriptions of syntax and functions.

The manual covers a comprehensive range of STL instructions, including bit logic, comparison, conversion, counter, data block, logical control, integer arithmetic, floating-point math, loading and transfer, program control, shift and rotate, timer, word logic, and accumulator instructions. It is intended for S7 programmers, operators, and maintenance personnel with knowledge of automation technology. This manual is written in Chinese.

What's inside

• Bit Logic Instructions
• Comparison Instructions
• Conversion Instructions
• Counter Instructions
• Data Block Instructions
• Logical Control Instructions
• Integer Arithmetic Instructions
• Floating-Point Math Instructions

Frequently asked questions

What is the intended audience for this manual?

The manual is intended for S7 programmers, operators, and maintenance/maintenance personnel.

Which STEP 7 software version does this manual apply to?

This manual applies to the STEP 7 programming package version 5.5.

What standard does the STL language conform to?

STL conforms to the 'Instruction List' language defined by IEC 1131-3.