Mitsubishi Electric QJ71LP21 Reference Manual page 324

APPENDIX
No. Name
2
SW0095
(149)/
SW0096
Reverse loop status of
(150)/
each station
SW0097
(151)/
SW0098
(152)
2
Loopback station
SW0099
(forward loop side)
(153)
2
Loopback station
SW009A
(reverse loop side)
(154)
2
SW009C
(156)/
SW009D
Loop usage status of
(157)/
each station
SW009E
(158)/
SW009F
(159)
Online test execution
SW00A8
item/faulty station
(168)
(requesting side)
SW00A9 Online test result
(169) (requesting side)
2: Valid only when SB0047 is off. When it turns on (error), the last data are retained.
App - 20
Table 2 Link special register (SW) list (Continued)
Description
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.
b15 b14 b13 b12
SW0095 16 15 14 13
SW0096 32 31 30 29
SW0097 48 47 46 45
SW0098 64 63 62 61
Stores the number of stations executing the loopback on the
forward loop side.
Range: 1 to 64
Stores the number of stations executing the loopback on the
reverse loop side.
Range: 1 to 64
Stores the loop usage status during transmission at each station,
separately for each of the forward and reverse loops.
0: Using the forward loop side (including the stations with the
maximum station number and smaller numbers as well as
reserved stations)
1: Using the reverse loop side
b15 b14 b13 b12
SW009C 16 15 14 13
SW009D 32 31 30 29
SW009E 48 47 46 45
64 63 62 61
SW009F
Stores both the online test item requested by the requesting
station and the faulty station. (Valid when the SB00A9 is on.)
b15 to
SW00A8 to
Faulty station
number
When there are
multiple faulty
stations, the station
number detected
first is stored.
Stores the online result on the requesting side.
(Valid when the SB00A9 is on.)
0 : Test normal
Other than 0 : Test error content (see the error codes in
Section 8.3)
to b4 b3 b2 b1 b0
to 5 4 3 2 1
to 21 20 19 18 17
to 37 36 35 34 33
53 52 51 50 49
to
Numbers 1 to 64 in the above table
indicate the station numbers.
to b4 b3 b2 b1 b0
5
to 4 3 2 1
to 21 20 19 18 17
to 37 36 35 34 33
53 52 51 50 49
to
Numbers 1 to 64 in the above table
indicate the station numbers.
b8 b7 to b0
to
Test item number
10 : Loop test
H
20 : Setup confirmation test
H
30 : Station order check test
H
40 : Communication test
H
MELSEC-Q
Use permitted/prohibited
Remote
Control Normal
master
station station
station
Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial
Remote I/O
station
App - 20