Appendix; Modbus Tcp; Function Codes - Siemens SENTRON PAC3200T Product Manual

Appendix

A.1

Modbus TCP

Detailed information about Modbus TCP can be found on the Modbus website
(http://www.modbus.org).
A.1.1

Function codes

Function codes control the data exchange. In doing so, a function code tells the slave which
action it is to take.
If an error occurs, the most significant bit (MSB) is set in the FC byte of the response frame.
Supported Modbus function codes
Table A- 1
FC
0x01
0x02
0x03
0x04
0x05
0x06
0x0F
0x10
0x2B
0x14
Equipment Manual, 09/2022, L1V30415168B-03
Supported Modbus function codes
Function in accordance with Modbus specification
Read Coils
Read Discrete Inputs
Read Holding Registers
Read Input Registers
Write Single Coil
Write Single Register
Write Multiple Coils
Write Multiple Registers
Read Device Identification
Read File Record (for average demand values)
A
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