Ldf; Andp - Delta C2000 series User Manual

detection status of the acquired contact rising-edge into the accumulative register.
Example Ladder diagram:
X0
Please refer to the specification of each model series for the applicable range of
Remarks
operands.
If rising-edge status is ON when PLC power is off, then the rising-edge status will be
TRUE when PLC power is on.
Mnemonic
Falling-edge detection operation

LDF

X0~X17
Operand

Usage of the LDF command is the same as the LD command, but the motion is different. It is
used to reserve present contents and at the same time, saving the detection status of the
acquired contact falling-edge into the accumulative register.
Ladder diagram:
Example
X0
Mnemonic
Rising-edge series connection

ANDP

X0~X17
Operand

ANDP command is used in the series connection of the contacts' rising-edge detection.
Ladder diagram:
Example
X0
X1
Y1
Y0~Y17 M0~M799

X1
Y1
Y0~Y17 M0~M799

X1
Y1
Chapter 16 PLC Function C2000 Series
Command code:
LDP
AND
OUT
Function
T0~159
 
Command code:
LDF
AND
OUT
Function
T0~159
 
Command code:
LD
ANDP
OUT
16-43
Operation:
Start X0 rising-edge
X0
detection
Series connection A
X1
contact of X1
Y1 Drive Y1 coil
C0~C79 D0~D399

Operation:
Start X0 falling-edge
X0
detection
Series connection A
X1
contact of X1
Y1 Drive Y1 coil
C0~C79 D0~D399

Operation:
Load A contact of X0
X0
X1 rising-edge
detection in series
X1
connection
Drive Y1 coil
Y1
－
－