Omron NX-SL series User Manual

3 Safety Standard Function Blocks
3 - 4
NX-series Safety Control Unit Instructions Reference Manual (Z931)
The following figure shows a programming example and timing chart for a PV of INT#5.
• Use the SF_CTU instruction (P. 3-5) to create a counter that increments the counter value each time
the counter input signal is received.
• Use the SF_CTUD instruction (P. 3-7) to create a counter that is both incremented and decremented.
Additional Information
When CV reaches 0, Q
changes to TRUE.
CV is decremented as soon as
Load changes to FALSE.
When Load changes to TRUE, CV
is set to the value of PV and Q
changes to FALSE.
CD=A
Load=abc
TRUE
FALSE
TRUE
FALSE
CV=ghi
PV=INT#5
Q=def
TRUE
FALSE
0

Omron NX-SL series Specifications

General

Brand	Omron
Model	NX-SL series
Category	Control Unit
Language	English