Allen-Bradley SmartGuard 600 - Safety Gate Monitoring Function Block

Publication 1752-UM001A-EN-P - October 2006
166 Function Blocks Command Reference
Use this table to diagnose and reset a discrepancy error condition in
the LC function block.
Light Curtain Function Block Timing Chart
The chart shows the I/O timing when the function block is set up as
Dual Channel Equivalent.
Safety Gate Monitoring
Function Block
Safety Gate Monitoring Function Block Diagram
Error Detection and Reset for LC Function Block
Error
Condition
Status When an Error Occurs To Reset the Error Condition
Output Enable Fault
Present
Error
Output
Discrepancy
Error
OFF
(Safety State)
ON Discrepancy
Error
Output: ON
Remove the cause of the error
and then either:
1. Make the inputs inactive
and active again.
2. Change the controller’s
operating mode to Idle and
back to Run.
Input 1 (NC)
Input 2 (NC)
Fault Present
Idle to Run
Output
Enable
Discrepancy
Error
Discrepancy Time
!
!
!
!
!
Input 1
(pair 1 - NC)
Output
Enable
Output Enable
Discrepancy Error (pair 1)
Default Connections Maximum I/O for Safety Gate Function
Input 2
(pair 1 - NC)
Input 1 (pair 1 - NC)
Input 2 (pair 1 - NC)
Input 3 (pair 2 - NC)
Input 4 (pair 2 - NC)
Function Test Signal
Discrepancy Error (pair 2)
Function Test Required
Synchronization Error
Function Test Error
Fault Present