Delta C2000 Series User Manual page 536

Command
LDP Start of forward edge detection action
X0~X17
Operand
The LDP command has the same usage as LD, but its action is different; its function is
to save current content, while also saving the detected state of the rising edge of the
contact to the cumulative register.
Ladder diagram:
X0
Please refer to the function specifications table for each device in series for the scope
of usage of each operand.
A rising edge contact will be TRUE after power is turned on if the rising edge contact is
On before power is turned on to the PLC.
Command
LDF Start of reverse edge detection action
X0~X17
Operand
The LDF command has the same usage as LD, but its action is different; its function is
to save current content while also saving the detected state of the falling edge of the
contact to the cumulative register.
Ladder diagram:
X0
Command
Forward edge detection series connection
ANDP
X0~X17
Operand
The ANDP command used for a contact rising edge detection series connection.
Ladder diagram:
X0
Y0~Y17 M0~M799
X1
Y1
Y0~Y17 M0~M799
X1
Y1
Y0~Y17 M0~M799
X1
Y1
Chapter 16 PLC Function Applications
Function
T0~159
Command
code:
Start of X0 forward edge detection
LDP X0
action
Create
AND X1
contact a of X1
OUT Y1 Drive Y1 coil
Function
T0~159
Command code:
LDF
AND
OUT
Function
T0~159
Command code:
LD
ANDP
OUT
16-45
C2000 Series
C0~C79 D0~D399
Description:
series connection
C0~C79 D0~D399
Description:
Start of X0 reverse
X0
edge detection action
Create
X1 connection to contact a
of X1
Y1 Drive Y1 coil
C0~C79 D0~D399
Description:
X0 Load Contact a of X0
X1 Forward edge
X1 detection series
connection
Y1 Drive Y1 coil
to
series