3. Database Management
20
First Day
Total Value
Minutely Data
00:01
23:01
Collected Value
23:02
Collected Value
24:00
Collected Value
01 o’clock
24-Month
Maximum Value
Hourly Data
January
12-Month
Maximum Value
Minimum Value
Average Value
31-Day
Maximum Value
Minimum Value
Average Value
Daily Data
Monthly Data
Yearly Data
Year
Maximum Value
Minimum Value
Average Value
Total Value
Total Value
Figure 3.6 Report Calculation Processing of Integrating-Meter Tag Data
Missing Value
Hourly, daily, monthly and yearly data becomes missing values in the following instances:
(1) Hourly data
In report calculations of hourly data, the hourly data is treated as
“
missing values
”
if all
historical tag data collected in one-minute periods within one hour is invalid. In the
following events, historical tag data is treated invalid:
Ÿ
A readout error of tag number and atom name.
Ÿ
Historical tag data exceeding the maximum tolerable value of the integrating meter or
historical tag data with a minus value is collected from an integrating-meter tag.
Ÿ
An event condition is not established when an event condition is set up in a historical
tag.
(2) Daily data
In making report-calculations of daily data, if all hourly data of one day is missing, the daily
data is treated as
“
missing values.
”
(3) Monthly data
In making report-calculations of monthly data, if all daily data of one month is missing
values, the monthly data is treated as
“
missing values.
”
(4) Yearly data
In making report-calculations of yearly data, if all monthly data of one year is missing values,
the yearly data is treated as
“
missing values.
”
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: ......