Delta DVP-EX2 Operation Manual page 448

D V P - E S 2 / E X 2 / E C 5 / S S 2 / S A 2 / S X 2 / S E / S E 2 & T P O p e r a t i o n M a n u a l - P r o g r a m m i n g
API Mnemonic Operands
91 LDF
Type
Bit Devices
OP
X Y M
S * * *
Operands:
S: device to be falling pulse triggered
Explanations:
LDF should be connected to the left side bus line. When the associated device S is driven from ON
to OFF, LDF will be ON for one scan cycle.
Program Example:
Ladder Diagram:
X0 X1
Instruction Code:
LDF X0
AND X1
OUT Y1
3 - 3 1 2
Falling–edge detection operation
Word devices
S K H KnX KnY KnM KnS T C D E F LDF: 3 steps
*
Y1
Operation:
; Load falling-edge contact X0
; Connect NO contact X1 in series.
; Drive Y1 coil
Function
* *
16-bit
ES2/EX2/EC5 SS2
Controllers
ES2/ SA2/
EX2/ SS2 SE/ SX2
EC5 SE2
Program Steps
SA2/SE/SE2 SX2