Mitsubishi MELSEC-A series Programming Manual

5. SEQUENCE INSTRUCTIONS
5 − 11
MELSEC-A
POINT
(2) Set the numbers of used MPS and MPP instructions to the same. If the
used numbers differ, the following occurs.
1) When the number of MPS instructions is larger than that of MPP
instructions, the PC performs operation in the changed circuit.
Before change
After change
2) If the number of MPP instructions is larger than that of MPS
instructions, this results in circuit plotting error and the PC cannot
perform proper operation.
• Coding
0 LD X000
1 AND X001
2 MPS
3 AND X002
4 OUT Y040
5 MRD
6 AND X003
7 OUT Y041
8 MPP
9 AND X004
10 OUT Y042
11 END
• Coding
0 LD X000
1 AND X001
2 MPS
3 AND X002
4 OUT Y040
5 MRD
6 AND X003
7 OUT Y041
8 NOP
9 AND X004
10 OUT Y042
11 END
()
(
)
(
)
0
X000 X001 X002
X004
X003
Y040
Y042
Y041
MPP is changed to NOP.
()
()
()
0
X000 X001 X002
X004
X003
Y040
Y042
Y041

Mitsubishi MELSEC-A series Specifications

General

Brand	Mitsubishi
Model	MELSEC-A series
Category	Controller
Language	English