Emerson 20/20 Manuale Utente
15 – 3
Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153
Figure 15-2. Trend Setup Screen
Section 15 • Trend Chart
Setup
The operator can modify options for pen selection drop-
down box from trend setup screen, see Figure 15-2.
Trend Setup Screen.
Trend setup screen will appear on press of Setup but-
ton when trending feature is not running. Trend Setup
screen allows the operator to select a maximum of 10
analog I/O channels for trending. The operator can also
set a path for trend data fi les from the drop-down box
in the setup screen. The USB will appear as an option in
drop-down box only when a USB drive is mounted on the
panel.
If there is no space available on the USB or when the USB
is unmounted from the panel and USB is selected for sav-
ing trend fi les, trend data fi les will be written to hard disk.
If the operator changes Press/Temp units from confi gu-
ration screen when trending feature is running, then
background trending is stopped.
down box from trend setup screen, see Figure 15-2.
Trend Setup Screen.
Trend setup screen will appear on press of Setup but-
ton when trending feature is not running. Trend Setup
screen allows the operator to select a maximum of 10
analog I/O channels for trending. The operator can also
set a path for trend data fi les from the drop-down box
in the setup screen. The USB will appear as an option in
drop-down box only when a USB drive is mounted on the
panel.
If there is no space available on the USB or when the USB
is unmounted from the panel and USB is selected for sav-
ing trend fi les, trend data fi les will be written to hard disk.
If the operator changes Press/Temp units from confi gu-
ration screen when trending feature is running, then
background trending is stopped.