Siemens SINAMICS G120 Operating Instructions Manual page 287

5. Switchover to bypass operation - option
If the inverter is not in a position to acknowledge active faults using the automatic restart,
then it goes into a fault condition with fault F07320, and does not make any other
attempts to restart.
You must make the following settings if you still wish to operate the motor in this situation:
– Set p1266 = 3889.10
– Ensure that the direction of rotation does not change when switching over to bypass
– Set p1267.0 = 1. This sets the switchover to bypass, independent of the speed,
– Make other settings for "Switch over to bypass (Page 291)".
You have commissioned the essential service mode.
Application example
An application example for the essential service mode can be found on the Internet:
http://support.automation.siemens.com/WW/view/de/63969509
(http://support.automation.siemens.com/WW/view/en/63969509)
Converter with CU230P-2 Control Units
Operating Instructions, 04/2015, FW V4.7 SP3, A5E34257946B AB
This means that you control switching over bypass operation with status bit 10 of the
status word for the essential service mode (r3889). This bit goes to 1, if the automatic
restart was interrupted.
operation.
activated using control signal p1266.
Advanced commissioning
6.7 Application-specific functions
287