160 Rockwell Automation Publication 2198-UM001D-EN-P - May 2014
Chapter 9 Kinetix 5500 Safe Torque-off - Hardwired Safety
Figure 67 demonstrates when the safe torque-off mismatch is detected and a
GuardStopInputFault is posted.
Figure 67 - System Operation in the Event that the Safety Enable Inputs Mismatch
When one safety input is turned off, the second input must also be turned off,
otherwise a fault is asserted (see Figure 68
). The fault is asserted even if the first
safety input is turned on again.
Figure 68 - System Operation in the Event that the Safety Enable Inputs Mismatch Momentarily
ATTENTION: The safe torque-off fault is detected upon demand of the safe
torque-off function. After troubleshooting, a safety function must be executed
to verify correct operation.
The Safe Torque Off fault can be reset only if both inputs are in the Off-state for
more than 1 second. After the fault reset requirement is satisfied, an MASR
command in the Logix Designer application must be issued to reset the
GuardStopInputFault.
24V DC
24V DC
0V DC
0V DC
1
1
0
0
1 Second
SafeTorqueOffInhibit
GuardStopInputFault
SS_IN_CH0
SS_IN_CH1
24V DC
24V DC
0V DC
0V DC
1
1
0
0
1 Second
SafeTorqueOffInhibit
GuardStopInputFault
SS_IN_CH0
SS_IN_CH1
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