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No.
Name
Description
Availability
Control
station
Normal
station
SB0048
Station status of own
station
Stores the station type (current status) of the own station.
Off: Normal station
On: Control station (when SB0044 is turned on)/sub-control station (when SB0044 is turned
off)
(Conditions)
• This relay is enabled when 'Baton pass error status of own station' (SB0047) is off. When
'Baton pass error status of own station' (SB0047) is turned on (error), data prior to error is
held.
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SB0049
Data link error status of
own station
Stores the data link status of the own station.
Off: Normal
On: Error
When this relay is turned on, the cause of the error can be checked with 'Cause of data link
stop' (SW0049).
Depending on the link refresh timing, the update of 'Cause of data link stop' (SW0049) may
be offset by one sequence scan.
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
SB004A
CPU minor error status of
own station
Stores the minor error occurrence status of the CPU module on the own station.
Off: No minor error
On: Minor error
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SB004B
CPU moderate/major error
status of own station
Stores the moderate/major error occurrence status of the CPU module on own station.
Off: No moderate/major error
On: Moderate/major error
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
SB004C
Link startup request
accept status of own
station
Stores the acceptance status of 'Link startup of own station' (SB0000).
Off: Not accepted (SB0000 is off.)
On: Accepted (SB0000 is on.)
(Conditions)
• This relay is enabled when 'Baton pass error status of own station' (SB0047) is off. When
'Baton pass error status of own station' (SB0047) is turned on (error), data prior to error is
held.

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SB004D
Link startup completion
status of own station
Stores the status of link startup processing requested with 'Link startup of own station'
(SB0000).
Off: Link startup not completed (SB0000, SB0050 are off.)
On: Link startup completed (SB0000, SB0050 are on.)
(Conditions)
• This relay is enabled when 'Baton pass error status of own station' (SB0047) is off. When
'Baton pass error status of own station' (SB0047) is turned on (error), data prior to error is
held.


SB004E
Link stop request accept
status of own station
Stores the acceptance status of 'Link stop of own station' (SB0001).
Off: Not accepted (SB0001 is off.)
On: Accepted (SB0001 is on.)
(Conditions)
• This relay is enabled when 'Baton pass error status of own station' (SB0047) is off. When
'Baton pass error status of own station' (SB0047) is turned on (error), data prior to error is
held.


SB004F
Link stop completion
status of own station
Stores the link stop processing status requested with 'Link stop of own station' (SB0001).
Off: Not completed (SB0001, SB0052 are off.)
On: Completed (SB0001, SB0052 are on.)
(Conditions)
• This relay is enabled when 'Baton pass error status of own station' (SB0047) is off. When
'Baton pass error status of own station' (SB0047) is turned on (error), data prior to error is
held.


SB0050
System link startup
request accept status
Stores the acceptance status of 'System link startup' (SB0002).
Off: Not accepted (SB0002 is off.)
On: Accepted (SB0002 is on.)
(Conditions)
• This relay is enabled when 'Baton pass error status of own station' (SB0047) is off. When
'Baton pass error status of own station' (SB0047) is turned on (error), data prior to error is
held.


SB0051
System link startup
completion status
Stores the status of link startup processing requested with 'System link startup' (SB0002).
Off: Not completed (SB0002, SB0054 are off.)
On: Completed (SB0002, SB0054 are on.)
(Conditions)
• This relay is enabled when 'Baton pass error status of own station' (SB0047) is off. When
'Baton pass error status of own station' (SB0047) is turned on (error), data prior to error is
held.


116
APPENDICES
Appendix 3 List of Link Special Relay (SB)