Delta Electronics Extension Digital I/O Module DOP-EXIO14RAE - Manual (Page 77)

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
Y0 SET
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
Y0 SET
SET Y0 Y0 latched (On)