Delta DVP-ES2 - Manual (Page 373)

3 . I n s t r u c t i o n S e t
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API Mnemonic Operands Function
90 LDP Rising–edge detection operation
Controllers
ES2/EX2 SS2 SA2
SE
SX2
Bit Devices Word devices Program Steps Type
OP X Y M S K H KnX KnY KnM KnS T C D E F
S * * * * * *
LDP: 3 steps
PULSE 16-bit 32-bit
ES2/EX2 SS2
SA2
SE
SX2 ES2/EX2 SS2
SA2
SE
SX2 ES2/EX2 SS2
SA2
SE
SX2
Operands:
S: device to be rising-edge triggered
Explanations:
LDP should be connected to the left side bus line. When the associated device S is driven from OFF
to ON, LDP will be ON for one scan cycle.
Program Example:
Ladder Diagram:
X0 X1
Y1
Instruction Code: Operation:
LDP X0 ; Load rising-edge contact X0
AND X1 ; Connect NO contact X1 in series
OUT Y1 ; Drive Y1 coil
Points to Note:
1. If the associated rising-edge contact is ON before PLC is power on, the contact will be
activated after PLC is power on.