Rising-Edge Detection Operation; Falling-Edge Detection Operation - Delta Electronics AC Motor Drive VFD-E User Manual

Mnemonic
LDP
Operand
Explanations:
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.
Program Example:
Ladder diagram:
X0
X1
Mnemonic
LDF
Operand
Explanations:
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.
Program Example:
Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11
LD
OUT
MCR
X0~X17 Y0~Y17
Command code: Operation:
LDP
Y1
AND
OUT
X0~X17 Y0~Y17
Appendix D How to Use PLC Function|
X11 Load A contact of X11
Y10 Drive Y10 coil
:
N0 Disable N0 common series
connection contact
Function

Rising-edge detection operation

M0~M159 T0~15
X0 Start X0 rising-edge detection
X1 Series connection A contact of X1
Y1 Drive Y1 coil
Function

Falling-edge detection operation

M0~M159 T0~15
C0~C7 D0~D29
--
C0~C7 D0~D29
--
D-41