38
Phone:(910) 392
‐
2490
Fax: (910) 392
‐
2123
416 Landmark Drive
Wilmington, NC 28412
www.easterninstruments.com
Se ng the Auto Delay
Typically, the Integrated Control Valve, while in Automa c Mode, will take several seconds to
“tune” in order to reach your set throughput value upon startup. In order to avoid a large
overshoot the op mal method for startup is to either start in Manual Mode and enter a
remembered Manual Out value, gathered through prior runs and then switch to Automa c
Mode once the tuning has occurred for several seconds, or to set the Auto Delay which
accomplishes this automa cally. Auto Delay is a method of preven ng control overshoot. In
order to set Auto Delay, a delay me and a Manual Value or posi on for the valve to start in
(equivalent to Manual Mode), must be calculated. The value is calculated using two known
set points consis ng of a known valve opening and a corresponding percentage of full scale.
An example would be: (30% valve opening corresponding to an output of 26% of fullscale).
Se ng the Auto Delay
From the TOP page (Main Menu) press the ADV
Bu on and then press the Control Modi
fi
ca ons
Bu on. Now press the Auto Delay Bu on, revealing
the screen above. Selec ng the Auto Delay Time will
enable the Auto Output to be held constant for the
indicated me period (you can select from 1/4s, 1/2s,
3/4s, 1s, 2s, 3s, 4s, or you can turn Auto Delay o
ff
).
The Auto Delay indicator can be seen by looking at
the Run page (pressing the Run Bu on from the TOP
page). Red indicates that the Auto Delay is enabled
and ac ve, and gray indicates that it is not currently
ac ve. To learn more about the Run page, please see
the HMI Screen Guide sec on of this manual.
Process Gain
To calculate a Process Gain value, ensure you are in
Auto Mode. Click on the Process Gain Bu on and you
will see the ADV.CTRL.Pg page (right) where you can
enter the two points men oned above. Please note
that the Y1 and Y2 values are percentages of Control
Out (found on main run screen) that are achieved at
the corresponding set points X1 and X2. Once en
‐
tered, the Process Gain is calculated automa cally.
Note: In cases where the set point has been changed or if the feeder is run with no product
and the valve opens to 100% open, upon restart, the new valve posi on will be calculated as
men oned above. Otherwise, the Auto Delay will retain the last known good valve posi on.
