166
FX
3U
/FX
3UC
Series Programmable Controllers
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 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
Instruc-
tion
Bit Devices
Word Devices
Others
System User
Digit Specification
System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
X Y M T C S D
.b KnX KnY KnM KnS
T
C
D
R U
\G
V
Z Modify K
H
E
"
"
P
LDP
3 3 3 3 3 3
3
LDF
3 3 3 3 3 3
3
ANDP
3 3 3 3 3 3
3
ANDF
3 3 3 3 3 3
3
ORP
3 3 3 3 3 3
3
ORF
3 3 3 3 3 3
3
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