Rockwell Automation 1752-L24BBBE SmartGuard 600 Controllers User Manual - Manual (Page 225)

Rockwell Automation Publication 1752-UM001E-EN-P - June 2014 225
Function Blocks Command Reference Appendix D
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
Figure 52 - Safety Gate Monitoring Function Block Diagram
The Safety Gate Monitoring function monitors the status of a safety gate, by
using input signals from a safety door switch or safety limit switch connected to
the door. The Output Enable signal turns on if the inputs from the switch being
monitored are active. The Output Enable signal turns off if the inputs become
inactive or if an error is detected for that function block.
Table 15 - 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