Mitsubishi MELSEC-A series Programming Manual

5. SEQUENCE INSTRUCTIONS
5 − 8
MELSEC-A
ORB
When circuit blocks are parallelly connected consecutively, the coding of program is
available in two types. However, proceed with the coding according to Coding
example 1.
()
X001 X000
X003 X002
M7
0
X005 X004
X007 X006
• Coding example 1
0 LD X000
1 AND X001
2 LD X002
3 AND X003
4 ORB
5 LD X004
6 AND X005
7 ORB
8 LD X006
9 AND X007
10 ORB
11 OUT M7
12 END
• Coding example 2
0 LD X000
1 AND X001
2 LD X002
3 AND X003
4 LD X004
5 AND X005
6 LD X006
7 AND X007
8 ORB
9 ORB
10 ORB
11 OUT M7
12 END
There is restriction on the number of ORBs
used.
If ORBs are written consecutively exceeding the
number mentioned below, the PC canno
t
per-form proper operation.
For AnA, A2AS, AnU, QCPU-A (A Mode) and
A2USH board: 15 instructions
(16 blocks)
For CPUs other than AnA, A2AS,AnU, QCPU-
A
(A Mode) and A2USH board: 7 instructions
(8 blocks)

Mitsubishi MELSEC-A series Specifications

General

Brand	Mitsubishi
Model	MELSEC-A series
Category	Controller
Language	English