Siemens SINAMICS G120 Operating Instructions Manual page 313

Figure 8-39
Both, the assignment of digital inputs with the selection of a safety function or with a
"standard" function can lead to an unexpected behavior of the drive.
Procedure
To check the assignment of the digital inputs, proceed as follows:
1. In STARTER, select the screen form for the terminals of the digital inputs.
2. Remove all signal interconnections of the digital inputs that you wish to use as fail-safe
3. When you use the data set changeover CDS, you must delete the multiple assignment of
You have ensured that the fail-safe inputs of the safety functions do not control other
functions in the inverter.
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB
Example: Assignment of digital inputs DI 4 and DI 5 with STO
input F-DI:
Figure 8-40 Remove pre-assignment of digital inputs DI 4 and DI 5
the digital inputs for all CDS.
8.8 Safe Torque Off (STO) safety function
Setting functions
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