Specifications

App - 21
Link special register (SW) list (Continued)
Use permitted/prohibited
Control
station
Normal
station
Remote
master
station
Remote
I/O
station
Number Name Description
Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial
*
2
SW0099
(153)
Loopback station
(forward loop
side)
Stores the number of stations executing the loopback on the forward loop side.
Range: 1 to 64
*
2
SW009A
(154)
Loopback station
(reverse loop
side)
Stores the number of stations executing the loopback on the reverse loop side.
Range: 1 to 64
SW009C
(156)/
SW009D
(157)/
SW009E
(158)/
SW009F
(159)
Loop usage
status of each
station
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 the reserved stations)
1: Using the reverse loop side
16
32
48
64
15 14 13
5
4321
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
Numbers 1 to 64 in the above table
indicate the station numbers.
to
*
2
SW00A8
(168)
Online test
execution
item/faulty station
(requesting side)
Stores both the online test item and the faulty station on the requesting side.
Valid when the SB00A9 is on.
SW00A8
b15 b0
to
to b8 b7
to
to
Faulty station
number
Test item
number
10
H
: Loop test
20
H: Setup confirmation test
30
H: Station order check tes
t
40
H
: Communication test
When there are
multiple faulty stations,
the station number
detected first is stored.
*
2
SW00A9
(169)
Online test result
(requesting side)
Stores the online result on the requesting side. (Valid when the SB00A9 is on.)
0 : Test normal
1 or more : Test error content (Refer to Appendix 7.1 for error codes)
*2: Valid only when SB0047 is off. When it turns on (error), the last data are retained.