4. Background Processing
32
Table 4.4 Functions and Operations of Redundant Systems
Function
SVR Operation for Online/Standby
Historical Database
Collection
Collected by Online SVR
’
s and some Standby
SVR
’
s
Save
Performed by both Online and Standby SVR
’
s
Mirroring
Performed at down recovery of Online SVR
’
s
Read
Read from Online SVR
’
s
Report Database
Filing
Performed by both Online and Standby SVR
’
s
Maintenance
Performed only by Online SVR
’
s
Mirroring
Performed at down recovery of Online SVR
’
s
Read
Read from Online SVR
’
s
Internal Process Tag
Data Save
Performed by both Online and Standby SVR
’
s
Alarm Occurrence
Occuured only by Online SVR
’
s
Mirroring
Performed at down recovery of Online SVR
’
s
Read
Read from Online SVR
’
s
Alarm Occurrence
Occuured only by Online SVR
’
s
Event Condition
Management
Event Condition
Registration
Performed by both Online and Standby SVR
’
s
Event Occurrence
Occuured only by Online SVR
’
s
History Message Save
Data Save
Performed at down recovery of Online SVR
’
s
Mirroring
Performed at down recovery of Online SVR
’
s
Read
Read from Online SVR
’
s
History Message Printing
Printing
Occuured only by Online SVR
’
s
Diagnosis
Diagnosis of each shared printer is individually
performed.
External Alarm Output
ADIO Output
Performed by both Online and Standby SVR
’
s
PCS Output
Occuured only by Online SVR
’
s
Mirroring
Performed at down recovery of Online SVR
’
s
Voice Output
Occuured only by Online SVR
’
s
Application Program Control
Performed by both Online and Standby SVR
’
s
according to Engineering.
Mirroring the Historical Database, Report Database, and history message save takes certain time
according to the number of mirrored data items.
If the standby or online SVR goes down during mirroring, mirroring is not performed
successfully.
Perform redundancy switching and initialization of SVR after checking that mirroring is
complete, avoiding on-the-time.
You can see the OIS
’
s station state display screen to check the online-standby state of
redundancy and the mirroring state.
Summary of Contents for 6F8C0791
Page 1: ...SVR DS System Function Manual 6F8C0791 Toshiba Integrated Control System MENU ...
Page 10: ...Safety Precautions viii ...
Page 22: ...2 Tag Management 8 ...
Page 48: ...4 Background Processing 34 ...
Page 52: ...6 Time Monitoring 38 ...
Page 56: ...8 SVR Engineering 42 ...
Page 62: ...Appendix1 System Specification Of OIS DS SVR DS 48 ...
Page 63: ......