Modbus Tcp Communication; Modbus Tcp Fieldbus; Register - Siemens SINAMICS G220 Operating Instructions Manual

14.5

Modbus TCP communication

14.5.1

Modbus TCP fieldbus

Overview
Modbus TCP is a fieldbus standard used by the converter to communicate with a higher-level
control system.
Requirement
Converter with Ethernet interface X150
Following selection of Modbus TCP in the commissioning tool, the power supply must be
switched off and then switched on again or a hardware reset must be performed via p0972.
Description of function
The Modbus protocol, which is based on a controller-device architecture, transfers data as
TCP/IP packets.
The converter supports connection to a maximum of three controllers.
TCP port 502 is reserved for Modbus TCP.
The higher-level control system accesses converter process data and parameters via registers.
• Process data: Registers 40100 - 40119
• Drive data: Registers 40300 - 40522
• Parameters via DS47: Registers 40601 - 40722
Modbus TCP always provides a basic Ethernet functionality:
• Commissioning access
• DCP, for example for setting the IP address
• SNMP for identification
14.5.2

Register

Overview
The Modbus protocol contains register and bit numbers for addressing memory. The registers
are assigned in converter control words, condition words and parameters of the converter.
SINAMICS G220 converter
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
14.5 Modbus TCP communication
Functions
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