41
Phone:(910) 392
‐
2490
Fax: (910) 392
‐
2123
416 Landmark Drive
Wilmington, NC 28412
www.easterninstruments.com
K
P
K
I
K
D
Conservative 0.031
0.125
0
Normal 0.062 0.187
0
Aggressive 0.062 0.250
0
PID #1 and #2 control the ICV in what is termed a cascade control in which the control output of PID
#1 becomes the set point of PID #2 , which in turn, controls the valve. Set PID #1 according to
the following table for Electronic Full Scale (eFS)= 100% Meter Volumetric Full Scale (vFS).
Use the heaviest material to calculate the vFS.
TABLE 1
PID Values For ICV with 2.0 second maximum stroke
w/PID #2 K
P
=100;
K
I
=0; and
K
D
= 100
If the vFS is other than 100%, then mul ply the PID value by the ra o. For example, If vFS =
150% then mul ply the respec ve PID values by 1.5. For Normal (default) se ng, then:
K
P
= 0.062 x 1.5 = 0.093
K
I
= 0.187 x 1.5 = 0.28
K
D
= 0
Se ng the PID 1
From the TOP.MENU page, press the “ADV Advanced Control” bu on which will open the
“TOP.ADV Advanced Control Page”. Press the “PID #1 Tuning” bu on which will open the
“ADV.PID” PID #1 Control Page. Press the “Kp”, “Ki”, or “Kd” bu ons to enter the values
above.
PID Control Loop Tuning
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CentriFeeder with ICV only
