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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
Summary of Contents for NX-SL series
Page 8: ...CONTENTS 6 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Page 28: ...Sections in this Manual 26 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Page 98: ...2 Standard Functions 2 64 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Page 104: ...2 Standard Functions 2 70 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Page 110: ...2 Standard Functions 2 76 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Page 265: ...I 1 I NX series Safety Control Unit Instructions Reference Manual Z931 Index ...
Page 268: ...I 4 NX series Safety Control Unit Instructions Reference Manual Z931 Index ...
Page 269: ......