Honeywell VRX180 Manuale Utente

Table  6-2  Point/Detail Menu Prompts (continued) 

Definition 

FIND 

Lets you display the trend from a certain time. A list of times will appear on the display, as 
shown. FIRST is the oldest time available in the trend. LAST is the most recent time 
available. 

FIRST:   JAN 

1 

1994 

12:00 

LAST: JAN  5 

1994  13:00 

FIND: JAN  1 

1994  12:00 

Select month, day, year, hour and minute. To cancel the search, press Display, Menu, 
Display1, Display2 or Display3 buttons. 

When the data has been found, the selected time/date will appear in the center of the trend 
area. The Point/Detail menu will also appear. 

ZOOM 

Lets you magnify (zoom) the displayed scale. 

Press the Increment and Decrement buttons to select the amount of magnification, shown in 
the lower right corner of the display. Note that the size of the Zoom cursor changes 
accordingly.  See Figure 6-3. 

OFF – uses point’s trend display limits (turns Zoom off) 

2X – uses half of point’s trend display limits 

4X – uses one fourth of point’s trend display limits 

FULL – uses point’s programmed limits (not its trend display limits) 

Press the Tab key to select the point/trace to be zoomed (magnified). 

Press Enter to display the magnified trend. The Point/Detail  menu is displayed to allow 
further analysis. 

Press the Display button to restore the primary display with the ZOOM limits. A “Z” appears in 
the lower right of the display. 

TIMEBASE 

Lets you change the timebase of the trend.  Choices are: 

NORMAL  – use the trend’s normal timebase. 

ALTERN (Alternate) – use the trend’s alternate timebase. 

Move the cursor box to  the desired timebase and press Enter.  The trend will be redisplayed 
in the new timebase.  An arrow points to the current timebase. Timebases are specified in 
the program mode.  Available for live trends only. 

If a storage trend CHANGE WITH KEY is set to YES, then changing the timebase will also 
change the storage rate of the storage trend.  That is, if the live Trend1 is displayed in 
NORMAL timebase, then the storage Trend1 will be stored at the LOW rate.  If the live 
Trend1 is displayed in the ALTERN timebase, then the storage Trend1 will be stored at the 
HIGH rate.  Trend2, 3 and 4 behave the same way. 

NEW FILE 

Select to see the Replay From Disk menu, from which you may select another stored file for 
replay.  Available for replay trends only.