Rockwell Automation 9301 Series RSView32 Users Guide - Manual (Page 499)

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RSView32 User’s Guide
To create control tags, you have to type a name in the Control Tag
field in the Trend dialog box. When you do, a folder with that name,
containing the trend control tags, is created in the tag database.
If you copy a trend, the new trend uses the same Control Tag folder
name. Therefore, if you plan to display both trends simultaneously,
rename the copied trend’s Control Tag folder name.
Trend control tags
The trend control tags are:
If at runtime you display multiple trends that use the same control
tags, changes to one trend affect all the other trends that use the
tags, including trends that are loaded in the cache and are not
visible.
IMPORTANT
Tag name Function Read or Write?
\CurrentFile Number of the current data log file. Each data log file is
numbered in sequence. Read and write (see
Function column)
\CurrentPen Number of the current pen (1 – 16) highlighted in the
legend. Read and write
\NewestFile Offset from current data log file to newest data log file. Read only
\NewestTime Time of the newest data sample available for plotting. Read only
\OldestFile Offset from current data log file to oldest data log file. Read only
\OldestTime Time of the oldest data sample available for plotting. Read only