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Appendix D How to Use PLC Function|
Ladder diagram:
X0
Command code: Operation:
X1
Y1
LDF X0
Start X0 falling-edge detection
AND X1
Series connection A contact of X1
OUT Y1
Drive Y1 coil
Mnemonic
Function
ANDP
Rising-edge series connection
Operand
X0~X17
Y0~Y17
9
9
M0~M159
T0~15
C0~C7
D0~D29
9
9
--
9
Explanations:
ANDP command is used in the series connection of the contacts’ rising-edge detection.
Program Example:
Ladder diagram:
X0
Command code: Operation:
LD
X1
Y1
X0
Load A contact of X0
ANDP X1
X1 rising-edge detection in series connection
OUT
Drive Y1 coil
Y1
Mnemonic
Function
ANDF
Falling-edge series connection
Operand
X0~X17
Y0~Y17
9
9
M0~M159
9
T0~15
C0~C7
D0~D29
9
9
--
Explanations:
ANDF command is used in the series connection of the contacts’ falling-edge detection.
Program Example:
Ladder diagram:
X0
Command code: Operation:
LD
X1
Y1
X0
Load A contact of X0
ANDF X1
X1 falling-edge detection in series
connection
OUT
Drive Y1 coil
Y1
Revision Oct. 2009, 07EE, SW--PW V1.14/CTL V2.14
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D-41
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