Programming; Programming Precautions; Interlock Related Signals - Mitsubishi Electric Melsec QJ71LP21 Reference Manual
Q corresponding melsecnet/h network system
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6
PROGRAMMING
6 PROGRAMMING
6.1 Programming Precautions
6.1.1 Interlock related signals
6
6 - 1
When applying any of the program examples introduced in this chapter to the actual
system, verify the applicability and confirm that no problems will occur in the system
control.
This section explains the precautions in creating programs using data on the network.
A list of the interlock signal devices used in the sequence programs is provided below.
For other explanations, such as the operation status and setting status of the host and
other stations, refer to Appendix 3, "List of the Link Special Relays (SB)" and Appendix
4, "List of the Link Special Registers (SW)".
When multiple network modules are installed, the interlock signal devices are
refreshed to the devices on the CPU side at 512 points (0
to the default settings as shown below.
POINT
The Q series uses the link special relays (SB) and the link special registers (SW) in
the entire intelligent function module. Therefore, it is important to manage SB/SW
properly so that duplicate SBs and SWs are not used in a program.
Assignments of the link special relay (SB) and the link special register
(SW) when multiple modules are installed
Mounting
Position
Device
SB
SW
1st module
2nd module
0
to 1FF
200
to 3FF
H
H
H
H
0
to 1FF
200
to 3FF
H
H
H
H
MELSEC-Q
to 1FF
) intervals according
H
H
3rd module
4th module
400
to 5FF
600
to 7FF
H
H
H
400
to 5FF
600
to 7FF
H
H
H
6 - 1
H
H
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