Siemens Sinamics G120 Function Manual page 279

The feedback signal "SSM active" for pulse inhibit remains active
Figure 6-41
With this setting, you must maintain a certain sequence before switching on the motor.
Procedure
To switch the motor on, proceed as follows:
1. Select STO (or SS1) after the motor has been switched off.
2. Deselect STO (or SS1) again before you switch on the motor.
3. After deselecting STO, wait until the inverter is "ready to switch on".
Alternatively: After deselecting STO, wait a certain time before switching on. We
recommend a wait time of 200 ms.
4. Switch on motor within 5 s after deselecting STO (ON command).
You have switched on the motor.
Inverter signal
STO active (extended functions)
Deselect STO (extended functions)
SSM feedback signal active (speed
below limit value)
ON/OFF1
Ready to switch on
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD
Switching on the motor when SSM is active
Parameter Included in the PROFI‐
safe telegram
r9722.0
r9720.0
r9722.15
r0054.0
r0052.0
6.7 Safe Speed Monitor (SSM)
Can be interconnec‐
ted with
F-DI
✓ ---
✓ ✓
✓ ---
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Operation
F-DO
✓
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✓
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