3 Safety Standard Function Blocks
3 - 10
NX-series Safety Control Unit Instructions Reference Manual (Z931)
SF_F_TRIG
This FB outputs TRUE for one task period only when the input signal changes to FALSE.
• F_TRIG assigns TRUE to output signal
Q
for one task period only when input signal
CLK
changes to
FALSE. Otherwise, the value of
Q
is FALSE.
• If the value of
CLK
is FALSE when the power supply is turned ON, the value of
Q
changes to TRUE.
The following figure shows a programming example and timing chart.
The SF_F_TRIG instruction assigns TRUE to output signal
Q
for only one task period when the power
supply is turned ON (RUN).
Instruction
Name
FB/FUN
Graphic expression
SF_F_TRIG
Down Trigger
FB
Variables
Input Variables
Variable
Name
Data type
Valid range
Default
Description
CLK
Input signal
SAFEBOOL TRUE or FALSE
FALSE
Input signal
Output Variables
Variable
Name
Data type
Valid range
Default
Description
Q
Output signal
SAFEBOOL TRUE or FALSE
FALSE
Output signal
Function
Additional Information
SF_F_TRIG
CLK
Q
CLK=A
Q=abc
Task period
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 ...
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