Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 168)

3 Basic Instructions
DVP-PLC Application Manual 3-14
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 Function Program steps
PLF Falling-edge output 1
Controllers
ES EX SS SA SX SC EH SV
X0 ~ X377 Y0 ~ Y377 M0 ~ M4095 S0 ~ S1023 T0 ~ T255 C0 ~ C255 D0 ~ D9999
Operand
- 9 9 - - - -
Explanations:
When X0 goes from On to Off (falling-edge trigger), PLF instruction will be executed and S 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
Timing Diagram:
1 scan time
X0
M0
Y0
SET Y0 Y0 latched (On)
Mnemonic Function Program steps
END Program End 1
Controllers
ES EX SS SA SX SC EH SV
Operand
N/A
Explanations: