8. Commissioning with controls
8.1 Introduction To commission a Modbus slave, a special configuration of the master using
a configuration file is usually not required.
The Modbus RTU transmission is based on a simple protocol containing the
slave address, a function code with offset address, the process data, and a
checksum.
8.2 Overview of the Modbus functions for data transmission
8.3 Modbus function and corresponding offset addresses of the AUMA MATIC
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Actuator controls AUMA MATIC AM/ AMExB/ AMExC
Operation instructions Modbus
Function Function code
(decimal)
Description
Force Single Coil 05 Sets one single bit to ON or OFF within slave
Force Multiple Coils 15 Sets several subsequent bits to ON or OFF within slave
Read Coil Status 01 Reads the status of individual pieces of output bit information out of
the slave.
Read Input Status 02 Reads the status of individual pieces of input bit information out of the
slave
Preset Single Register 06 Writs data into one single holding register (16 bit) of slave
Preset Multiple Register 16 Writes data into subsequent holding registers
Read Input Register 04 Reads the content of input data register (16 bit) out of the slave
Read Holding Register 03 Reads the content of holding registers out of the slave
Action Permissible function func-
tion code (decimal)
Permissible offset
addresses (decimal)
Permissible offset ad-
dresses (hexadecimal)
Write or read process
representation output data
(master outputs)
Force Single Coil (05)
Force Multiple Coils (15)
Read Coil Status (01)
0 to 2 0x0000 to 0x0002
Preset Single Register (06)
Preset Multiple Register (16)
Read Holding Register (03)
4096 to 4098 0x1000 to 0x1002
Read process representation
input data (master inputs
Read Input Status (02) 8192 to 8239 0x2000 to 0x202F
Read Input Register (04) 12288 to 12296 0x3000 to 0x3008
Write or read parameters of
AUMA MATIC
Preset Single Register (06)
Preset Multiple Register (16)
Read Holding Register (03)
16384 to 16433 0x4000 to 0x4031
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