Rockwell Automation 21G PowerFlex 750-Series AC Drives Reference Manual - Manual (Page 156)

156 Rockwell Automation Publication 750-RM001F-EN-P - February 2012
Chapter 12 Troubleshooting the PowerFlex Safety Option Module
If outputs are already in a faulted state due to a previous fault, and a subsequent
Stop Category fault or Fault While Stopping fault occurs, outputs remain in a
faulted state, door control logic can be set to Unlock if feedback signals indicate
that Standstill Speed has been reached, and the safety option continues to
monitor for faults.
If a Stop Category fault or Fault While Stopping fault occurs after Standstill
Speed has been reached and the safety option has set door control logic to
Unlock, the safety option goes to the Safe State.
Status Attributes For diagnostic purposes only, you can view status attributes by accessing the P68
[Guard Status] parameter and the P69 [IO Diag Status] parameter from a HIM
module, DriveExplorer, DriveExecutive, or RSLogix 5000 software.
The status attributes are valid only when the safety option is in Run mode. If the
safety option is in Program mode or has an Invalid Configuration Fault, the
status attributes are not updated.
Guard Status Attributes
These attributes are stored in the P68 [Guard Status] parameter. Each bit
corresponds to a different attribute.
ATTENTION: If a fault occurs after Standstill Speed has been reached, door
control logic remains unlocked.
A Safe State fault may set the Door Control output (DC_Out) to OFF.
Bit Display Text Description
0 StatusOK This bit indicates when there are no faults. It is set (1), when all of the Fault Status bits 1…31 are 0 (no faults). The bit is 0 if any Fault Status
bit from 1…31 indicates a fault (1).
1 Config Lock This bit shows the status of the P5 [Lock State] parameter. A 1 indicates the configuration is locked; a 0 indicates the configuration is
unlocked.
2 MP_Out This bit shows the status of the safety option’s Motion Power command to the drive. A 1 indicates Motion Power is enabled; a 0 indicates
Motion Power is disabled.
3 SS In This bit displays the logical value, 1 or 0, evaluated for the dual-channel SS_In input.
4 SS Req This bit is set to 1 when a safe stop is initiated by either a transition of the SS_In input from ON to OFF or by a Stop Category fault.
This bit is reset to 0 when a successful SS Reset occurs and when the Safety mode is set to Disabled (0).
5 SS In Prog This bit is set to 1 when a safe stop is initiated by the transition of the SS_In input from ON to OFF with no active fault conditions. It is not set
to 1 when a Safe Stop is initiated by a Stop Category fault.
While set to 1, this bit will be reset (0) if Standstill Speed is reached or any fault condition is detected.
6 SS Decel This bit is set to 1 if the configured Stop Delay [Max Stop Time] is active for a Safe Stop 1 or Safe Stop 2 while the safety option is executing
the Safe Stop.
This bit is not set during a Category 0 Safe Torque Off Safe Stop.
This bit is reset (0) when Standstill Speed is detected, a Safe State fault occurs, or a SS Reset occurs.
7 SS Stopped This bit is set to 1 if a successful Safe Stop has been executed and the speed is less than or equal to the Standstill Speed.
This bit is set to 0 by an SS Reset or the occurrence of a Stop Category fault.
It is always 0 when the safety option is configured for a Safe Torque Off without Standstill Speed Checking.