Basic Instructions
2 − 26
Outline DF: Turns on the contact for only one scan when the leading edge of
the trigger is detected.
DF/: Turns on the contact for only one scan when the trailing edge of
the trigger is detected.
7
Program example
Boolean
Ladder Diagram
Address Instruction
Leading edge differential
X0
Y10
0
X1
Y11
3
(DF)
(DF/)
T r ailing edge differential
0
1
2
3
4
5
ST X 0
DF
OT Y 10
ST X 1
DF/
OT Y 11
Explanation of example
Y10 goes on for only one scan when the leading edge (off → on) of X0 is detected.
Y11 goes on for only one scan when the trailing edge (on → off) of X1 is detected.
X0
X1
1 scan
Y10
Y11
Leading
edge
Trailing
edge
1 scan
1 scan1 scan
on
off
on
off
on
off
on
off
Related instructions
With the FPΣ,FP−X, FP0R, FP2, FP2SH and FP10SH, the DFI instruction can be used. It is executed only for
the first scan.
DF
DF/
Leading edge differential
Trailing edge differential
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