Micromod Micro-PWC: 53PW6000 MicroPWC Configuration Guide - Manual (Page 274)

Micro-PWC CONFIGURATION GUIDE
254 Trends
7.3.4.1 Historical Tag
The Historical Tag entry box allows entry of the tagname of a point in the Historical database, an Historical
Computation point, or a point in the Historical Block database. The item entered will be assigned to the
trend trace. The tagname can be typed in directly by clicking on the entry box and entering the information
via the keyboard.
7.3.4.1.1 Historical Database Tagnames
If the tagname of a point in the Historical database is not immediately known, this information can be
located via the Find button, located immediately to the right of the Historical Tag entry box. Enter the
known portion of the Historical database tagname in the Historical Tag entry box, then click Find. The
Historical Tags window will be displayed, with the first instance containing that string displayed in a list box,
and highlighted.
Clicking on Find with no entry in the Historical Tag entry box causes the Historical Tags window to be dis-
played. This window contains a list of all tagnames that are configured in the Historical database.
7.3.4.1.2 Historical Computation Tagnames
Historical Computation points are computed points in the Historical database, and are specified in the
format:
.
where htag is the tagname of a point in the Historical database and comptype is the atom for the computa-
tion type. Atom names for each computation type and computation rate are shown in
Table 7-1 .
For example, RAND1.HAV contains the hourly average for the Historical database point named RAND1.
TC00214A
Figure 7-5. Trend Trace Configuration Window
Table 7-1. Historical Computation Atoms
Period Average Minimum
Minimum
Time
Maximum
Maximum
Time
Standard
Deviation
Hourly .HAV .HMN .HTMN .HMX .HTMX .HSD
Daily .DAV .DMN .DTMN .DMX .DTMX .DSD
Monthly .MAV .MMN .MTMN .MMX .MTMX .MSD
Yearly .YAV .YMN .YTMN .YMX .YTMX .YSD