Siemens SINAMICS G120 Operating Instructions Manual page 255

Description
The forced checking procedure (test stop) of the basic functions is an inverter self test. The
inverter checks its circuits to switch off the torque. If you are using the Safe Brake Relay, for
a forced checking procedure, the inverter also checks the circuits of this component.
You start the forced checking procedure each time that the STO function is selected.
Using a timer block, the inverter monitors as to whether the forced checking procedure is
regularly performed.
Figure 6-31
Parameter
p9659
r9660
r9773.31
Converter with the CU250S-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG
Starting and monitoring the forced checking procedure (test stop)
Description
Forced dormant error detection timer (Factory setting: 8 h)
Monitoring time for the forced dormant error detection.
Forced dormant error detection remaining time
Displays the remaining time until the forced dormant error detection and testing the
safety switch-off signal paths.
1 signal: Forced dormant error detection is required
Signals for the higher-level control system.
Advanced commissioning
6.17 Safe Torque Off (STO) safety function
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