Historical Tag; Redundancy Of Historical Database - Toshiba TOSDIC-CIE DS Manual

Collectable Data
Collecting Period
Number of Collection Points
Number of Saved Samples
Save Period
l l l l Historical Tag
Historical trend data, history messages and report data are managed for each historical tag. A
maximum of 5,000 historical tags can be set up in the SVR-DS. Historical tags are set up each
with a historical tag name, tag number, atom name, collection period, save period and other
information. Archive groups can also be set up.
Those historical tags used in the report function are set up with report data processing type and
other information.
l l l l Redundancy of Historical Database
The SVR-DS redundant system makes historical tag data redundant. If one SVR-DS unit fails
and some data in the historical database is missing, the historical tag data is equalized and
missing data will be recovered when this SVR-DS unit is started up again.
See the section related to control of the redundant system for cautions about equalization.
Table 3.1 Specification of Historical Database
Item
Fixed Period
Collection
Events
No collection
Specification
PCS process tags
Internal OIS process tags
Application set values
Trend data :15 period types between 5s and 1 day
Report data :1 minute
Common trend/report data: 20s to 1 minute
Event conditions
Collected by application program
Maximum 5,000 tags/system
Maximum 200 tags/second-SVR-DS
Maximum 10,000 samples/tag
Maximum 20 million samples/SVR-DS
Approx. 14h to 10,000 days
In accordance with collection period
3. Database Management
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