Mitsubishi MELSEC-A series Programming Manual

5. SEQUENCE INSTRUCTIONS
5 − 2
MELSEC-A
5.1 Contact Instructions
5.1.1 Operation start, series connection,
parallel connection
(LD, LDI, AND, ANI, OR, ORI)
Available Device
Bit device Word (16-bit) device Constant Pointer Level
Carry
flag
Error
flag
X Y M L S B F T C D W R A0 A1 Z V K H P I N
Digit specification
Index
M9012 (M9010, M9011)
O O O O O O O O O
*1: Index qualification can be used with AnA, A2AS, AnU, QCPU-A (A Mode) and A2USH board only.
Functions LD,LDI
(1) LD is the contact A operation start instruction and LDI is the contact B operation
start instruction. They draw the ON/OFF data of the specified device and use
the data as an operation result.
AND,ANI
(1) AND is the NO contact series connection instruction and ANI is the NC contact
series connection instruction. They read the ON/OFF data of the specified
device, performs the AND operation of that data and the previous operation
result, and use it as a new operation result.
(2) There are no restrictions on the use of AND and ANI. However, the following
conditions are provided in ladder mode on the GPP.
1) Write: When AND or ANI is connected serially, a circuit of up to 21 stages
can be written.
Applicable
CPU
All CPUs
LD
LDI
AND
ANI
OR
ORI
X
00
1
X
003
X
00
1
X
00
2
X
00
2
X
003
Device number
*1

Mitsubishi MELSEC-A series Specifications

General

Brand	Mitsubishi
Model	MELSEC-A series
Category	Controller
Language	English