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5 SEQUENCE INSTRUCTIONS
5.1.2 Pulse operation start, pulse series connection, pulse parallel connection
(LDP, LDF, ANDP, ANDF, ORP, ORF)
Internal Devices
Set
(System, User)
Data
Bit
Word
S
[Instruction Symbol] [Execution Condition]
LDP
LDF
ANDP
ANDF
ORD
ORF
[Set Data]
Set Data
S
[Functions]
LDP, LDF
(1) LDP is the leading edge pulse operation start instruction, and is ON only at the leading edge of
the designated bit device (when it goes from OFF to ON).
If a word device has been designated, it is ON only when the designated bit changes from 0 to
1.
In cases where there is only an LDP instruction, it acts identically to instructions for the
creation of a pulse that are executed during ON(
A ladder using an LDP instruction
X0
X0
5 - 5
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MELSECNET/10(H)
File
Direct J \
Register
Bit
Bit device number/Bit designation of word device (
X1/D0.1
X1/D0.1
X2/D0.2
X2/D0.2
X3/D0.3
X3/D0.3
Devices used as contacts
MOV
K0
D0
M0
QCPU
PLC CPU
Basic
High Performance
Usable Devices
Special
Function
Module
Word
U \G
Meaning
P).
A ladder not using an LDP instruction
X0
MOVP
K0
X0
PLS
MELSEC-Q/QnA
QnA
Process CPU
Index
Other
Constant
Register
K, H
Zn
)
S
Data Type
Bit
D0
M0
5 - 5
Q4AR
DX
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