Siemens SINAMICS G120 Function Manual page 222

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Operation
6.8 Safe Direction (SDI)
Deselecting SDI after a discrepancy
Procedure
To deselect SDI, proceed as follows:
1. Remove the discrepancy.
2. Acknowledge the discrepancy message with the fail-safe acknowledge signal via a safety
input: F-DI = 0 → 1 → 0.
Alternatively, you can acknowledge the message in one of the following ways. However,
the drive stops in these cases:
– 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 inverter supply voltage and on again (power on reset).
3. Acknowledge the inverter with the "standard" acknowledge signal.
You have acknowledged the discrepancy message and deselected SDI.
222
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 04/2014, FW V4.7, A5E34261271B AA

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