Omron NX-SL series User Manual

3 Safety Standard Function Blocks
3 - 12
NX-series Safety Control Unit Instructions Reference Manual (Z931)
SF_RS
This FB retains the value of a SAFEBOOL variable.
It gives priority to the Reset input if both the Set input and Reset input are TRUE.
• This instruction forms a self-holding output that gives priority to resetting. The following table shows
the relationship between the inputs and outputs.
The following figure shows a programming example and timing chart.
Instruction Name FB/FUN Graphic expression
SF_RS Reset-Priority Keep FB
Variables
Input Variables
Variable Name Data type Valid range Default Description
SET Set SAFEBOOL TRUE or FALSE FALSE Set input
RESET1 Reset BOOL TRUE or FALSE FALSE Reset input (Given priority.)
Output Variables
Variable Name Data type Valid range Default Description
Q1 Keep SAFEBOOL TRUE or FALSE FALSE Keep output
Function
Value of SET Value of RESET1 Value of Q1
TRUE TRUE FALSE
TRUE FALSE TRUE
FALSE TRUE FALSE
FALSE FALSE Not changed.
SF_RS
SET
RESET1
Q1
Set=A
Reset1=B
Q1=abc
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE

Omron NX-SL series Specifications

General

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