Rockwell Automation 21G PowerFlex 750-Series AC Drives Reference Manual - Manual (Page 155)

Rockwell Automation Publication 750-RM001F-EN-P - February 2012 155
Troubleshooting the PowerFlex Safety Option Module Chapter 12
Fault Reactions When a fault occurs, the type of fault and the status of the system determine the
resulting state of the system.
Safe State Faults
If a Safe State fault occurs in any operational state including the Disabled state,
the safety option goes to the Safe State. In the Safe State, all safety outputs are in
their safe states.
Stop Category Faults and Fault While Stopping Faults
If a Stop Category fault or Fault While Stopping fault occurs while the safety
option is monitoring motion, the safety option initiates the configured Safe Stop
Type.
The type of fault detected determines the safety option’s response when the fault
occurs while the safety option is executing the configured Safe Stop Type.
Type of Fault Detected Response
Fault While Stopping Faults:
• Deceleration fault (Decel Flt)
• Stop Speed fault (Stop Spd Flt) Outputs are placed in a faulted
state, but door control logic can
be set to Unlock if feedback
signals indicate that Standstill
Speed has been reached. The
safety option continues to
monitor for faults.
These Stop Category Faults:
• SMS Speed fault when the P63 [Max Spd Stop Typ] is configured for Use Safe
Torque Off with Check for Standstill (Torque Off)
• Acceleration fault when the P66 [Max Acc Stop Typ] is configured for Use Safe
Torque Off with Check for Standstill (Torque Off)
• Direction fault (Dir Flt), if the fault occurred while a safe stop was in progress.
These Stop Category faults:
• SLS Speed fault (SLS Spd Flt)
• Direction fault (Dir Flt), if the fault was detected before the safe stop was
initiated. In this case, the safety option does not perform Direction Monitoring
while executing the configured Safe Stop Type.
• Door Monitoring fault (Door Mon Flt)
• ESM Monitoring fault (ESM Mon Flt)
• Lock Monitoring fault (Lock Mon Flt)
• SMS Speed fault when the P63 [Max Spd Stop Typ] is configured for Use
Configured Safe Stop Type (Safe Stp Typ)
• Acceleration fault when the P66 [Max Acc Stop Typ] is configured for Use
Configured Safe Stop Type (Safe Stp Typ)
The safety option continues to
execute the configured Safe Stop
Type and monitor for faults.