6.11.2 Response to a discrepancy of the fail-safe acknowledge signal
Drive response
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Figure 6-53 Behavior of the inverter for discrepancy of the input signal for fail-safe acknowledgment
The inverter does not set the error bit of the safety functions (= internal event).
After the tolerance time has expired, the inverter signals the discrepancy (fault C01770 or
C30770).
Independent of the voltage levels available, the inverter sets the evaluation of the discrepant
F-DI into the safe state (= zero) until you acknowledge the inverter using a fail-safe signal or
you switch off the power supply voltage and switch it on again.
Inverter signals Parameter Included in the PROFI‐
safe telegram
Can be interconnec‐
ted with
F-DI F-DO
"Standard" acknowledgment p2103 --- --- ---
Fail-safe acknowledgment r9720.7 ✓ ✓ ---
Acknowledging a discrepancy message
Procedure
To acknowledge the discrepancy message, proceed as follows:
1. Remove the discrepancy.
2. Acknowledge the discrepancy message in one of the following ways:
– Select the STO function and then deselect again: F‑DI = 1 → 0 → 1.
– Select the SS1 function and then deselect again: F‑DI = 1 → 0 → 1.
– Switch off the power supply voltage of the inverter and switch on again.
3. Acknowledge the inverter with the "standard" acknowledge signal.
Operation
6.11 Fail-safe acknowledgment
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD 301
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