System Operation In The Event Of Sto Inputs Discrepancy (Fault Case 3) - Rockwell Automation MagneMotion QuickStick HT User Manual

When one safety input is turned OFF and the second input is not turned OFF within 100 ms, a
fault is asserted (see
turned ON again.
Figure 7-4: System Operation in the Event of STO Inputs Discrepancy (fault case 3)
IMPORTANT The GuardStopInputFault can be reset only if both inputs are
QuickStick HT User Manual
Figure 7-4). The fault remains asserted even if either safety input is
24V DC
SS_IN_CH0
0V DC
24V DC
SS_IN_CH1
0V DC
1
SafeTorqueOffFault
0
1
GuardStopRequestStatus
0
1
GuardStopInputFault
0
ATTENTION: The safe torque-off fault is detected upon
demand of the safe torque-off function. After troubleshooting
the STO function or performing maintenance that might
affect the STO function, the STO function must be executed
to verify correct operation.
in the OFF-state for more than 1 second. The STO function
must be executed to reset the faults if all the fault conditions
are removed.
Rockwell Automation Publication MMI-UM007F-EN-P - September 2020
QSHT 5700 Inverter Safe Torque-off Function
1 Second Discrepancy Limit
100 ms
No Fault
No Fault
Hardwired Safe Torque-off
Faulted
Stop Requested
Faulted
273