Chapter 14 PLC Function
|
C200 Series
14-35
:
MCR
N0
Disable N0 common
series connection
contact
:
LD X10
Load A contact of X10
MC
N0
Enable N0 common
series connection
contact
LD X11
Load A contact of X0
OUT Y10
Enable N0 common
series connection
contact
:
Load A contact of X1
MCR
N0
Drive Y0 coil
Mnemonic Function
LDP
Rising-edge detection operation
X0~X17 Y0~Y17 M0~M799 T0~159 C0~C79 D0~D399
Operand
9
9
9
9
9
-
Usage of the LDP 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 rising-edge into the accumulative register.
Command code:
Operation:
LDP
X0
Start X0 rising-edge
detection
AND
X1
Series connection A
contact of X1
Example
Ladder diagram:
X1
Y1
X0
OUT Y1
Drive Y1 coil
Remarks
Please refer to the specification of each model series for the applicable range of
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 Function
LDF
Falling-edge detection operation
X0~X17 Y0~Y17 M0~M799 T0~159 C0~C79 D0~D399
Operand
9
9
9
9
9
-
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.
Command code:
Operation:
LDF
X0
Start X0 falling-edge
detection
AND
X1
Series connection A
contact of X1
Example
Ladder diagram:
X1
Y1
X0
OUT Y1
Drive Y1 coil
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Call 1(800)985-6929 for Sales
deltaacdrives.com
sales@deltaacdrives.com