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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
7 Basic Instruction
7.5 LDP, LDF, ANDP, ANDF, ORP, ORF
1
Introduction
2
Overview
3
Instruction
List
4
Devices
in Detail
5
Specified the
Device &
Constant
6
Before
Programming
7
Basic
Instruction
8
FNC00-FNC09
Program Flow
9
FNC10-FNC19
Move & Compare
10
FNC20-FNC29
Arith. & Logic
Operation
7.5 LDP, LDF, ANDP, ANDF, ORP, ORF
Outline
LDP, ANDP, and ORP instructions for contacts detect the rising edge, and become active during one operation cycle
only at the rising edge of a specified bit device (that is, when the bit device turns ON from OFF).
Contact instructions LDF, ANDF and ORF detect the falling edge, and become active during one operation cycle only
at the falling edge of a specified bit device (that is, when the bit device turns OFF from ON).
1. Instruction format
→ For the number of instruction steps, refer to Section 7.15.
2. Applicable devices
S: This function is supported only in FX3U/FX3UC PLCs.
Instruc-
tion
Bit Devices Word Devices Others
System User Digit Specification System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
XYMTCSD.b KnX KnY KnM KnS T C D R U\G VZModifyKH E ""P
LDP 333333 S
LDF 333333 S
ANDP 333333 S
ANDF 333333 S
ORP 333333 S
ORF 333333 S
LDP
Load Pulse
Basic Instruction
LDP
−
Continuous
Operation
Pulse (Single)
Operation
Mnemonic Operation Condition
LDF
Load Falling Pulse
Basic Instruction
LDF
−
Continuous
Operation
Pulse (Single)
Operation
Mnemonic Operation Condition
ANDP
AND Pulse
Basic Instruction
ANDP
−
Continuous
Operation
Pulse (Single)
Operation
Mnemonic Operation Condition
ANDF
AND Falling Pulse
Basic Instruction
ANDF
−
Continuous
Operation
Pulse (Single)
Operation
Mnemonic Operation Condition
ORP
OR Pulse
Basic Instruction
ORP
−
Continuous
Operation
Pulse (Single)
Operation
Mnemonic Operation Condition
ORF
OR Falling Pulse
Basic Instruction
ORF
−
Continuous
Operation
Pulse (Single)
Operation
Mnemonic Operation Condition