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MELSEC-Q
APPENDICES
Table 3 Link special register (SW) list (Continued)
No. Name Description
Availability
Control
station
Normal
station
Remote
master
station
Remote I/O
station
Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial
2
SW0095
(149)/
SW0096
(150)/
SW0097
(151)/
SW0098
(152)
Reverse loop status of
each station
Stores the reverse loop status of each station (including the
host).
0: Normal (including the stations with the maximum station
number and smaller numbers as well as reserved stations)
1: Abnormal
Disconnected station remains in the status when it was
disconnected.
16
32
48
64
15 14 13 5 4 3 2 1
31 30
47 46
63 62
29
45
61
21 20 19 18 17
37 36 35
34
33
53 52 51 50 49
to
to
to
to
b15 b14 b13 b12 b4 b3 b2 b1 b0
SW0095
SW0096
SW0097
SW0098
to
Numbers 1 to 64 in the above table
indicate the station numbers.
2
SW0099
(153)
Loopback station
(forward loop side)
Stores the station number of which station is performing the
loopback in the forward loop.
1 to 64 : Station No.
7D
H : Remote master station
2
SW009A
(154)
Loopback station
(reverse loop side)
Stores the station number of which station is performing the
loopback in the reverse loop.
1 to 64 : Station No.
7D
H : Remote master station
2
SW009C
(156)/
SW009D
(157)/
SW009E
(158)/
SW009F
(159)
Loop usage status of
each station
Stores the incorrect cable connection (IN-IN, OUT-OUT) status.
(Refer to Section 8.2.9)
All 0 or all 1: No incorrect connection of optical fiber cables
Other than above: Incorrect connection of optical fiber cables
16
32
48
64
15 14 13 5 4 3 2 1
31 30
47 46
63 62
29
45
61
21 20 19 18 17
37 36 35
34
33
53 52 51 50 49
to
to
to
to
b15 b14 b13 b12 b4 b3 b2 b1 b0
SW009C
SW009D
SW009E
SW009F
to
Numbers 1 to 64 in the above table
indicate the station numbers.
SW00A8
(168)
Online test execution
item/faulty station
(requesting side)
Stores both the online test item requested by the requesting
station and the faulty station. (Valid when the SB00A9 is on.)
Stations disconnected from the network are not included among
the faulty stations because there is no response.
SW00A8
b15 b0
to
to
b8
b7
to
to
Test item number
10
H
: Loop test
20
H
: Setup confirmation test
30
H
: Station order check test
40
H
: Communication test
When there are
multiple faulty
stations, the station
number detected
first is stored.
Faulty station
number
SW00A9
(169)
Online test result
(requesting side)
Stores the online result on the requesting side.
(Valid when the SB00A9 is on.)
0 : Test normal
Other than 0
: Test error content (refer to the error codes in
Section 8.3)
2: Valid only when SB0047 is off. When it turns on (error), the last data are retained.