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3 Safety Standard Function Blocks
NX-series Safety Control Unit Instructions Reference Manual (Z931)
3
SF_TP
• This FB outputs TRUE during the set time after the timer starts. The time is set in milliseconds.
• The timer starts when timer input
IN
changes to TRUE and timer output
Q
changes to TRUE.
Elapsed time
ET
is incremented as time elapses.
• When
ET
reaches set time
PT
, timer output
Q
changes to FALSE.
ET
is not incremented after that.
• The timer is reset when
IN
changes to FALSE.
ET
changes to 0.
The timer is not reset even if
IN
changes to FALSE after the timer starts but before
ET
reaches
PT
.
• The following figure shows a programming example and timing chart for a
PT
of T#10ms.
Variable
abc
changes to TRUE as soon as variable
A
changes to TRUE. Variable
abc
changes to
FALSE 10 ms later.
• Use the SF_TON instruction for a timer that starts when
IN
changes to TRUE and then changes the
timer output to TRUE when the elapsed time reaches the set time.
• Use the SF_TOF instruction for a timer that starts when
IN
changes to FALSE and then changes the
timer output to FALSE when the elapsed time reaches the set time.
Function
Additional Information
In=A
Q=abc
ET=def
PT=T#10ms
FALSE
TRUE
FALSE
TRUE
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: ......