Omron NE1A-SCPU01 - 07-2009 - Light Curtain Monitoring

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Command Reference: Function Blocks Section 8-5
Timing Chart
When Set to Dual Channel Equivalent
8-5-4 Light Curtain Monitoring
Diagram
General Description
The Light Curtain Monitoring function block monitors a type-4 safety light cur-
tain.
The Output Enable signal will turn ON if the input from the safety light curtain
being monitored is active. The Output Enable signal will turn OFF if the input
is inactive or if an error is detected for the function block.
Set Parameters
The discrepancy time must be equal to or greater than the NE1A-series Con-
troller’s cycle time.
Input1
(NC)
Output
Enable
Discrepancy
Error
Fault
Present
Input2
(NC)
Idle to RUN Discre
p
anc
y
time
Default Maximum Number of I/O
Output
Enable
Input 1
(NC)
Input 2
(NC)
Parameter Setting range Default setting
Input type Dual Channel Equivalent
Dual Channel Complementary
Dual Channel Equivalent
Discrepancy time 0 to 30 s in 10-ms increments
A discrepancy time check will not be per-
formed if 0 is set.
30 ms