Configuring Modbus Unit Identifier - Danfoss iC7 Series Operating Manual

iC7 Series Modbus
Operating Guide
When configuring PRP, it is important to notice the assignment of the Ethernet ports:
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X1 = LAN A
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X2 = LAN B
Illustration 11: Example of Parallel Redundancy

5.5 Configuring Modbus Unit Identifier

In Modbus TCP, the device is addressed by its IP address, and the server ID is replaced by a single-byte unit identifier.
Value 255 (0xFF) must be used for the Modbus unit identifier (client ID).
When configuring the Modbus PLC client, a server ID, or a server address is used to address the serial Modbus RTU devices in the
range of 1–247.
In Modbus TCP, an IP address and a single-byte unit identifier are used to address the device.
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N O T I C E
LAN A
N O T I C E
Modbus Configuration
LAN B
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