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Number
Name
SW0170 to
Parameter error
SW0177
status (each station)
SW0180 to
Reserved station
SW0187
function disable
status
SW0194
Loop test result
APPX
214
Appendix 4 Link Special Register (SW) List
Description
Stores the parameter status for each station.
• 0: No parameter error
• 1: Parameter error found
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
SW0170
16
15
14
13
12
11
SW0171
32
31
30
29
28
27
SW0172
48
47
46
45
44
43
64
63
62
61
60
59
SW0173
80
79
78
77
76
75
SW0174
SW0175
96
95
94
93
92
91
112
111
110
109
108
107
SW0176
SW0177
Each number in the table represents a station No.
is fixed to 0.
(Conditions)
• This is enabled when the Baton pass status (own station) (SB0047) is OFF.
• Holds the data immediately before the error.
• This is enabled only for normal stations in the Baton pass status (each station)
(SW00A0 to SW00A7).
• Reserved stations and stations higher than the maximum station number are
ignored.
Stores the station that is currently in reserved station function disable status.
• 0: No reserved station function disable is specified
• 1: Reserved station function disable in progress
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
SW0180
16
15
14
13
12
11
SW0181
32
31
30
29
28
27
SW0182
48
47
46
45
44
43
64
63
62
61
60
59
SW0183
80
79
78
77
76
75
SW0184
SW0185
96
95
94
93
92
91
SW0186
112
111
110
109
108
107
SW0187
Each number in the table represents a station No.
is fixed to 0.
(Conditions)
• This is enabled when the Baton pass status (own station) (SB0047) is OFF.
• Holds the data immediately before the error.
• This is enabled only for normal stations in the Baton pass status (each station)
(SW00A0 to SW00A7).
• Stations higher than the maximum station number are ignored.
Stores a loop test result.
• 0: Normal completion
• Other than 0: Abnormal end (Refer to the figure below.)
b15 b14
to
SW0914
• b0: Master station duplicated
• b1: Station number duplicated
• b2: Invalid station No.
• b3: Reserved station specification error
(A station that exists on the network is set as a reserved station in the master station.)
• b4: All stations faulty
• b5: Inconsistent total number of slave stations
• b6: Station type setting error
• b7: Loopback stations exist.
• b8 to b15: Fixed to 0
10
9
8
7
6
5
4
3
26
25
24
23
22
21
20
19
42
41
40
39
38
37
36
35
58
57
56
55
54
53
52
51
74
73
72
71
70
69
68
67
90
89
88
87
86
85
84
83
106
105
104
103
102
101
100
99
120
119
118
117
116
115
10
9
8
7
6
5
4
3
26
25
24
23
22
21
20
19
42
41
40
39
38
37
36
35
58
57
56
55
54
53
52
51
74
73
72
71
70
69
68
67
90
89
88
87
86
85
84
83
106
105
104
103
102
101
100
99
120
119
118
117
116
115
b1 b0
Availability
Master
station
2
1
18
17
34
33
50
49
66
65
82
81
98
97
114
113
2
1
18
17
34
33
50
49
66
65
82
81
98
97
114
113
Local
station
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