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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
7 Basic Instruction
7.5 LDP, LDF, ANDP, ANDF, ORP, ORF
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 from OFF to ON).
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 from ON to OFF).
1. Instruction format
→ For the number of instruction steps, refer to Section 7.16.
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 V Z Modify K H E ""P
LDP S
LDF S
ANDP S
ANDF S
ORP S
ORF 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