Siemens S7-200 USS Communication Commands and Inverter Communication Manual

About this manual

This manual explains the USS (Universal Serial Synchronous) communication commands available on the Siemens S7-200 PLC and how to configure them for communication with MicroMaster variable‑frequency drives. It covers command syntax, parameter settings, and required programming steps in STEP 7‑Micro/WIN.

The document also details drive configuration, status monitoring, error handling, and the required hardware connections, providing tables of supported baud rates, voltage ranges, and I/O assignments for successful integration. This manual is written in Chinese.

What's inside

• USS Command Overview
• USS Command Usage
• USS Command Parameters
• Drive Configuration
• Drive Parameters
• Drive Status Monitoring
• Programming Steps in STEP 7‑Micro/WIN
• Error Handling and Diagnostics

Specifications

Frequently asked questions

How do I initialize USS communication on the S7-200?

Set the USS_INIT variable to 0 before starting communication.

Which baud rates can be used for USS communication?

The supported baud rates are 1200, 2400, 4800, 9600 and 19200.

How is the drive output enabled?

Set the DRIVE input variable to 1 to enable the MicroMaster drive.