Modbus RTU/ASCII Slave Manual

This file is about the connection instructions of the Siemens series HMI with various brands. It includes information such as communication speed, controller station number, control zone/status zone, DOP terminal definition, controller Read/Write address definition, etc.


Modbus RTU/ASCII Slave Manual - cover page
Brand
Modbus
Category
Industrial Supply
Document type
User Manual
Language
Chinese
Pages
2
File format
PDF
File size
135 KB
Published
16 March, 2012
Updated
30 September, 2023
MD5 checksum
60EF40F2DAA53C63E1A38CB9A5C5079F

About this manual

The document provides the default communication parameters for both ASCII and RTU modes, including baud rate, data bits, parity, and stop bits. It also lists the controller station number and the address ranges for control and status areas.

Detailed tables map Modbus addresses to the HMI internal registers for both volatile (Word) and non‑volatile (Bit) data, and the text includes wiring notes and register definitions for output registers and discrete outputs. This manual is written in Chinese.

What's inside

  • Communication Settings
  • Controller Station Number
  • Register Address Ranges
  • Wiring Instructions
  • Modbus to Internal Register Mapping

Specifications

ASCII communication speed9600 baud, 7 data bits, Even parity, 1 stop bit
RTU communication speed9600 baud, 8 data bits, Even parity, 1 stop bit
Controller station number (default)1
Control area / status area addressesW40100 / W40200
Output register address rangeW40001 - W50000
Discrete output address rangeB1 - B2048

Frequently asked questions

What are the default communication parameters for ASCII mode?

The default ASCII communication parameters are 9600 baud, 7 data bits, even parity, and 1 stop bit.

How are Modbus addresses related to the HMI internal registers?

Modbus addresses map directly to internal registers; for example, Modbus address W40001 corresponds to internal register W40001, and address B00001 corresponds to internal bit register B0‑00001.

What is the range of discrete output addresses?

Discrete outputs are addressed from B1 to B2048.

What is the default controller station number?

The default controller station number is set to 1.

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