Series 590
INSTALLATION
298292EB
Edition 2013-05-13
27/56
4.5.3.1
Optimize P-Gain, I-Gain
1. Introduction
For pressure control the parameters P-Gain and I-Gain have to be set according to the systems characteristics. The
best set of parameters can be found empirically.
Normally the default settings (P-Gain=0.0056; I-Gain=0.032) will result in good pressure control performance. For
some applications tuning may be required to improve performance.
2. Slow pressure response
If the response to a set point change is slow the control speed can be increased by raising P-Gain and I-Gain.
3. Fast pressure response with oscillations
If the response to a set point change is too fast and the pressure is oscillating the control speed can be reduced by
lowering P-Gain and I-Gain.
4. Parameter adjustment
It is recommended first to increase / decrease the P-Gain by one step. The also the I-Gain can be changed by one
step.
After each change the response should be tested.
If different set points are required it is recommend to test the response at the highest and at the lowest set point.
