Endress+Hauser Topclean S CPC30, Operating Instructions Manual

Page: 78 / 178

6 Commissioning Topclean S
78 Hauser
PWM = pulse length proportional
PFM = pulse frequency proportional
3-point step = three-point step controller
The controller in the CPM153:
The CPM153 contains a PID controller which is specially adapted to the pH neutralisation process.
It has the following features:
• Separate configuration of both process sides
• Simple adaptation to batch or inline processes
• Switching option between constant and range-dependent modulation gain.
Relating to the effect on the gain factor, a difference is made between two standard
implementations:
• The factor K
R
(X) is the total gain (see fig. 41. This is implemented in the CPM153).
• The gain factor K
P
(X) is the purely proportional gain.