Basic Instruction - Mitsubishi Electric MELSEC FX3U Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
7.

Basic Instruction

This chapter explains types and functions of basic sequence instructions.
For beginners to sequence control, we offer "Introduction Course" and "Relay Ladder Course" learning texts
for reference.
We can also offer the PLC learning software "Beginner Course".
Mnemonic Name
Contact Instruction
LD Load
LDI Load Inverse
LDP Load Pulse
LDF Load Falling Pulse
AND AND
ANI AND Inverse
ANDP AND Pulse
ANDF AND Falling Pulse
OR OR
ORI OR Inverse
ORP OR Pulse
ORF OR Falling Pulse
Symbol
Applicable devices
Applicable devices
Applicable devices
Applicable devices
Applicable devices
Applicable devices
Applicable devices
Applicable devices
Applicable devices
Applicable devices
Applicable devices
Applicable devices
Function Applicable devices
Initial logical operation
contact type NO (normally X,Y,M,S,D .b,T,C
open)
Initial logical operation
contact type NC (normally X,Y,M,S,D .b,T,C
closed)
Initial logical operation of
X,Y,M,S,D .b,T,C
rising edge pulse
Initial logical operation of
X,Y,M,S,D .b,T,C
falling/trailing edge pulse
Serial connection of NO
X,Y,M,S,D .b,T,C
(normally open) contacts
Serial connection of NC
X,Y,M,S,D .b,T,C
(normally closed) contacts
Serial connection of rising
X,Y,M,S,D .b,T,C
edge pulse
Serial connection of falling/
X,Y,M,S,D .b,T,C
trailing edge pulse
Parallel connection of NO
X,Y,M,S,D .b,T,C
(normally open) contacts
Parallel connection of NC
X,Y,M,S,D .b,T,C
(normally closed) contacts
Parallel connection of
X,Y,M,S,D .b,T,C
rising edge pulse
Parallel connection of
X,Y,M,S,D .b,T,C
falling/trailing edge pulse
7 Basic Instruction
1
2
Reference
3
Section 7.1
Section 7.1
4
Section 7.5
Section 7.5
5
Section 7.3
Section 7.3
Section 7.5
6
Section 7.5
Section 7.4
7
Section 7.4
Section 7.5
8
Section 7.5
9
10
187