5. SEQUENCE INSTRUCTIONS
5 − 7
MELSEC-A
Program Examples ANB
When circuit blocks are serially connected consecutively, the coding of program is
available in two types. However, proceed with the coding according to Coding
example 1.
()
X002 X000
X003 X001
0
X006 X004
X007 X005
X008
X009
M7
• Coding example 1
0 LD X000
1 OR X001
2 LD X002
3 OR X003
4 ANB
5 LD X004
6 OR X005
7 ANB
8 LD X006
9 OR X007
10 ANB
11 LD X008
12 OR X009
13 ANB
14 OUT M7
15 END
• Coding example 2
0 LD X000
1 OR X001
2 LD X002
3 OR X003
4 LD X004
5 OR X005
6 LD X006
7 OR X007
8 LD X008
9 OR X009
10 ANB
11 ANB
12 ANB
13 ANB
14 OUT M7
15 END
There is no restriction on the number of ANBs
used.
If ANBs are written consecutively exceeding the
number mentioned below, the PC cannot
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)
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