Appendix; Modbus Tcp; Function Codes - Siemens SENTRON 7KM PAC2200 Product Manual

Appendix

A.1

Modbus TCP

Detailed information about Modbus can be found at 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
0 x 01
0 x 02
0 x 03
0 x 04
0 x 05
0 x 06
0 x 0F
0 x 10
0 x 2B
0 x 14
PAC2200
Equipment Manual, 12/2019, L1V30415167B-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 mean values)
A
97