SETUP
OPTIONS
3 - 18
Trend Loop 1/Trend Loop
2
The trend screen option allows monitoring any combination of the
process variable, set point and control output over a tunable time
period. This feature is useful when fine tuning PID constants to moni-
tor process responses to step changes. In these situations, the user
can define the trend to update as fast as twice per second or as slow
as once per hour. This provides a trend range of 24 seconds to 48
hours. The trend screen display area is 24 pixels wide by 82 pixels
high.
While at the trend screen, the control features are fully active. The
operator may change set point, control output or change control
modes with the auto/manual key. Note that the trend values are not
stored, so historical data is lost when departing the trend screen. The
screen provides numeric readout of all three values, as well as mode
and alarm indications. These trend screen features allow maintaining
complete process control while graphically viewing the dynamics of
the process over time.
TREND LOOP 1
TREND LOOP 2
14. From the setup/options menu, press or to highlight
TREND
LOOP 1
or
TREND LOOP 2
. Press
. The
SET LOOP
screen
appears.
15. Press or to highlight the function. Press
. The
ON/OFF
box appears. Press or to turn on or turn off the function. Press
again and then to move to the next function. When
RATE
is
highlighted, press
. A pull down menu will appear that lists the
trend time values available.
NOTE:
Whenever the
ESC
soft key menu option is shown, pressing
the soft key directly below it deletes the entered information for that
function, and the correct information can be entered.
16. Press the soft key below
PREV SCRN
to return to the options/
setup menu.
L1: MAN
L2: MAN
SETUP
Enter the
Ambient
Temperature
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Terminals
XX.X C
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