Siemens Sinamics G120 CU240E Operating Instructions Manual page 192

Functions
5.11 Operation in fieldbus systems
STEP 7 sample program for acyclic communication
Simple S7 program for parameterizing the frequency inverter
The S7 program, which supplies data for acyclic communication between the frequency
inverter and the central controller, can be used for PROFIBUS and PROFINET.
Figure 5-37
Flags 9.0 to 9.3 specify whether parameters are read or written:
● M9.0: request to read parameters
● M9.1: request to write parameters
● M9.2: displays the read process
● M9.3: displays the write process
192
STEP 7 program example for acyclic communication - OB1
Frequency inverter
Operating Instructions, 08.10. 2008, t.b.d.