Link Special Relays (Sb)/Registers (Sw) - Mitsubishi Electric SW0DNC-MNETH-B User Manual

11 PROGRAMMING

11.3 Link Special Relays (SB)/Registers (SW)

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The data linking information is stored in the link special relays (SB)/registers (SW).
They can be used by the user program, or used for investigating faulty areas and the
causes of errors by monitoring them.
The following table shows which SB and SW can be used to check which information.
For more details, refer to "Q Corresponding MELSECNET/H Network System
Reference Manual (PLC to PLC network)".
(1) To know the information about the host
Item
Personal computer status of the host
(normal/abnormal)
The external power supply status of the host
Communication status between MELSECNET/H
board and personal computer.
Setting status of the MELSECNET/H board
Running status of the MELSECNET/H board
(2) To know information about the entire network
Item
CPU and personal computer status of each station
(normal/abnormal)
CPU and personal computer operation status of
each station (RUN/STOP)
Cyclic transmission status of each station
The external power supply status of each station
Link scan, communication mode
Setting information of the network
Running information of the network
Line status
(3) To know redundant CPU system information
Item
Operating mode of redundant CPU
Pairing setting of each station
System status in redundant CPU system
SB
SB004A
H
SW004B
SB004B
H
SB0042
H
SB0020 SW0020
H
SB0040 to 44 SW0040
H H
SB0058 to 69 SW0054
H H
SB0047 to 49 SW0047
H H
SB
SW0080
SB0080
H
SB0088
SW0088
H
SB0084 SW0084
H
SB0074 SW0074
H
SB008C SW008C
H
SB0068
H
SW0068
SB0069
H
SB0054 to 69 SW0054
H H
SB0070 SW0070
H
SB0090 to 9A SW0090
H H
SB
SB01F4 SW01F4
H
SB01F8 SW01F8
H
SB01FC SW01FC
H
MELSEC
SW
H
----
H
to 46
H H
to 68
H H
to 4A
H H
SW
to 83
H H
to 8B
H H
to 87
H H
to 77
H H
to 8F
H H
to 6D
H H
to 68
H H
to 73
H H
to 9F
H H
SW
to 1F7
H H
to 1FB
H H
to 1FF
H H
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