GE Ecomagination AF-600 FP Programming Manual page 170

Parameter Description
The proportional band (error causing output to change
from 0–100%) can be calculated with the formula
1
× Max Reference
Proportional Gain
XC-22 Ext. 1 Integral Time
Range: Function:
10000 [0.01 - Over time, the integrator accumulates a
s 10000 s] contribution to the output from the PID
*
controller as long as there is a deviation
between the reference/setpoint and
feedback signals. The contribution is propor-
tional to the size of the deviation. This
ensures that the deviation (error)
approaches 0.
Quick response on any deviation is obtained
when the integral time is set to a low value.
Setting it too low, however, may cause the
control to become unstable.
The value set is the time needed for the
integrator to add the same contribution as
the proportional for a certain deviation.
If the value is set to 10000, the controller
acts as a pure proportional controller with a
P-band based on the value set in
parameter CL-93 PID Proportional Gain. When
no deviation is present, the output from the
proportional controller is 0.
XC-23 Ext. 1 Differentation Time
Range: Function:
0 s [0 - 10 s] The differentiator does not react to a constant
*
error. It only provides a gain when the feedback
changes. The quicker the feedback changes, the
stronger the gain from the differentiator.
XC-24 Ext. 1 Dif. Gain Limit
Range: Function:
5 [1 - 50] Set a limit for the differentiator gain (DG). The DG
*
increases if there are fast changes. Limit the DG to
obtain a pure differentiator gain when changes are
slow and a constant differentiator gain when quick
changes occur.
3.23.4 XC-3# Ext. CL 2 Ref./Fb.
XC-30 Ext. 2 Ref./Feedback Unit
Option: Function:
See parameter XC-10 Ext. 1 Ref./Feedback Unit for
details.
[0]
[1] %
*
[5] PPM
[10] 1/min
[11] RPM
DET-620D
AF-600 FP™ Programming Guide
XC-30 Ext. 2 Ref./Feedback Unit
Option:
[12] Pulse/s
[20] l/s
[21] l/min
[22] l/h
[23] m3/s
[24] m3/min
[25] m3/h
[30] kg/s
[31] kg/min
[32] kg/h
[33] t/min
[34] t/h
[40] m/s
[41] m/min
[45] m
[60] °C
[70] mbar
[71] bar
[72] Pa
[73] kPa
[74] m WG
[75] mm Hg
[80] kW
[120] GPM
[121] gal/s
[122] gal/min
[123] gal/h
[124] CFM
[125] ft3/s
[126] ft3/min
[127] ft3/h
[130] lb/s
[131] lb/min
[132] lb/h
[140] ft/s
[141] ft/min
[145] ft
[160] °F
[170] psi
[171] lb/in2
[172] in WG
[173] ft WG
[174] in Hg
[180] HP
XC-31 Ext. 2 Minimum Reference
Range:
0 ExtPID2Unit
03/2016 All rights reserved.
Function:
Function:
[-999999.999 - par. See parameter XC-11 Ext. 1
*
XC-32 ExtPID2Unit] Minimum Reference for
details.
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