Siemens SIMATIC ET 200SP Manual page 22

Programming
Instruction
Modbus_Master
Modbus_Slave
The instructions are part of STEP 7 (TIA Portal). The instructions are available in the "Instructions"
task card under Communication > Communication processor.
Additional information
Additional information on programming the communication modules can be found in the
function manual CM PtP - Configurations for point-to-point connections
(http://support.automation.siemens.com/WW/view/en/59057093).
22
Meaning
The instruction Modbus_Master allows you to communicate as Modbus
master by means of the PtP port.
The instruction Modbus_Slave allows you to communicate as Modbus slave
by means of the PtP port.
CM PtP communication module (6ES7137-6AA00-0BA0)
Manual, 01/2013, A5E03790792-01