Appendix C Use of Basic Instructions|DOP-EXIO Series
C-12
Revision March, 2008, Doc. Name: 2007PDD23000014
Mnemonic Functions
PLS
Rising-edge Output
X0~X17 Y0~Y17 M0~M1279 S0~S127 T0~T127 C0~C254 D0~D599
Operand
-
9 9
- - - -
Explanations:
When X0 goes from Off to On (rising-edge trigger), PLS instruction will be executed and M0 will send
out pulses for once of 1 scan time.
Program Example:
Ladder diagram: Instruction code: Operation:
LD X0
Loading in A contact of X0
PLS M0
M0 rising-edge output
LD M0
Loading in contact A of M0
X0
M0
PLS
M0
Y0SET
Timing Diagram:
X0
M0
Y0
1 scan time
SET Y0
Y0 latched (On)
Mnemonic Functions
PLF
Falling-edge Output
X0~X17 Y0~Y17 M0~M1279 S0~S127 T0~T127 C0~C254 D0~D599
Operand
-
9 9
- - - -
Explanations:
When X0 goes from On to Off (falling-edge trigger), PLF instruction will be executed and M0 will send
out pulses for once of 1 scan time.
Program Example:
Ladder diagram: Instruction code: Operation:
LD X0 Loading in A contact of X0
PLF M0 M0 falling-edge output
LD M0 Loading in contact A of M0
X0
M0
PLF
M0
Y0SET
SET Y0 Y0 latched (On)
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