Download Safe Limited Speed Wiring Example

Chapter 12
Troubleshoot the MSR57P Relay
If a Stop Category Fault or Fault While Stopping Fault occurs after
Standstill Speed has been reached and the relay has set door control
logic to Unlock, the relay goes to the Safe State.
ATTENTION
If a fault occurs after Standstill Speed has been reached, door
control logic may remain unlocked.
A Safe State Fault may set the Door Control output (DC_Out) to
OFF.
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 or via DriveExplorer or DriveExecutive
software.
The status attributes are only valid when the MSR57P relay is in Run
mode. If the MSR57P relay 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.
Guard Status
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 is set to 0, if the MP_Out dual-channel output is being commanded to the OFF state. This bit is set to 1 if
the MP_Out dual-channel output is being commanded to the ON state.This bit is the commanded value, not the
readback value.
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.
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Publication 440R-UM004A-EN-P - December 2008