Trane TR200 Series Programming Manual page 206

21-22 Ext. 1 Integral Time
Range:
10000.0 [0.01 - 10000.00 s]
0 s*
21-23 Ext. 1 Differentation Time
Range:
0.00 s* [0.00 - 10.00 s]
21-24 Ext. 1 Dif. Gain Limit
Range:
5.0 N/A* [1.0 - 50.0 N/A]
21-3* Closed Loop 2 Ref/Fb
Configure Extended Closed Loop 2 Controller reference and feedback.
21-30 Ext. 2 Ref./Feedback Unit
Option:
[0]
[1] * %
[5] PPM
[10] 1/min
[11] RPM
[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
TR200 Programming Guide
Function:
Over time, the integrator accumulates a 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 proportional to the
size of the deviation. This ensures that the deviation (error) approaches
zero.
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 con-
tribution as the proportional part for a certain deviation.
If the value is set to 10,000, the controller will act as a pure proportional
controller with a P-band based on the value set in par.20-93
tional Gain. When no deviation is present, the output from the propor-
tional controller will be 0.
Function:
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.
Function:
Set a limit for the differentiator gain (DG). The DG will increase if there
are fast changes. Limit the DG to obtain a pure differentiator gain at slow
changes and a constant differentiator gain where quick changes occur.
Function:
See par.21-10 Ext. 1 Ref./Feedback Unit
Parameter Description
PID Propor-
for details
205