Eaton Power Xpert C445 - Modbus TCP Protocol

Appendix C—Optional Communication Cards
Power Xpert C445 Global Motor Management Relay MN042003EN—January 2019 www.eaton.com 291
Modbus TCP Protocol
The C445 Ethernet Card supports the Modbus TCP protocol
as a server device.
The supported function codes are shown below. The
Modbus register map for the C445 is identical for the
Modbus TCP and the Modbus serial protocols and may be
found in Appendix D of this user manual.
Table 117. Modbus TCP Function Codes
Function Code Name
Standard Function Codes
0x01 Read Coils
0x02 Read Discrete Inputs
0x03 Read Holding registers
0x04 Read input registers
0x05 Write single coil
0x06 Preset Single register
0x07 Read exception status
0x08 Diagnostics
0x0F Write Multiple Coils
0x10 Write Multiple Registers
0x17 Read/Write Multiple Registers
0x2B/0x0E Read device identification
Vendor Specific Function Codes
0x42 Device Services
0x43 Read Attribute
0x44 Write Attribute
0x45 Read/Write attribute