Siemens SIMATIC S7-1200 Reference Manual page 76

Basic instructions
✔
Read out parameters from the drive
✔ ✔ ✔ ✔
Read data from drive (16 drives)
✔
Read data from drive (31 drives)
✔
Change parameters in the drive
✔ ✔ ✔ ✔
Change data in drive (16 drives)
✔
Change data in drive (31 drives)
MODBUS (RTU)
S7-300/400: Commands for ET200SP CM PtP
✔ ✔ ✔ ✔
Configure communication module for Modbus
✔ ✔ ✔ ✔
Communicate as Modbus master
✔ ✔ ✔ ✔
Communicate as Modbus slave
Instructions with lower memory requirements, but also less
functional scope.
✔
Configure port on the PtP module for Modbus RTU
✔
Communicate via the PtP port as Modbus master
✔
Communicate via the PtP port as Modbus slave
A5E33284667-AF
Extended instructions
Description
Technology
LAD/FBD
USS_RPM
USS_Read_Param
USS_Read_Param_31
USS_WPM
USS_Write_Param
USS_Write_Param_31
Modbus_Comm_Load
Modbus_Master
Modbus_Slave
Recommendation: Use the instructions
specified above. You cannot apply the
instructions decentrally with a CM or in an
ET 200.
MB_COMM_LOAD
MB_MASTER
MB_SLAVE
Communication
STL
SCL
(not S7-1200)
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