Ldp, Ldf, Andp, Andf, Orp, Orf - Mitsubishi Electric MELSEC FX3U Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
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
LDP
Load Pulse
LDF
Load Falling Pulse
ANDP
AND Pulse
ANDF
AND Falling Pulse
ORP
OR Pulse
ORF
OR Falling Pulse
2. Applicable devices
Bit Devices
Instruc-
System User
tion
X Y M T C S D .b KnX KnY KnM KnS T C D R U \G
LDP
LDF
ANDP
ANDF
ORP
ORF
: This function is supported only in FX
200
Mnemonic
Basic Instruction
−
LDP
Mnemonic
Basic Instruction
−
LDF
Mnemonic
Basic Instruction
−
ANDP
Mnemonic
Basic Instruction
−
ANDF
Mnemonic
Basic Instruction
−
ORP
Mnemonic
Basic Instruction
−
ORF
→ For the number of instruction steps, refer to Section 7.15.
Digit Specification
/FX
3U
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
Word Devices
Special
System User
Unit
V Z Modify K H
PLCs.
3UC
7 Basic Instruction
7.5 LDP, LDF, ANDP, ANDF, ORP, ORF
Others
Con- Real Charac-
Index
stant Number ter String
E
Pointer
" " P