Mycom S CPM 153
6 Start-up
Hauser
57
PWM = pulse length proportional
PFM = pulse frequency proportional
Three PS = three-point step controller
The controller in the CPM 153:
The CPM 153 contains a PID controller which is specially adapted to the pH neutralisa-
tion 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. 20. This is implemented in the CPM 153).
•
The gain factor K
P
(X) is the purely proportional gain.
The following diagram shows the schematic structure of the CPM 153 controller.
Because of the simplicity of the diagram, the Laplace transform of subfunctions is given.
C07-CPM153xx-16-12-00-en-003.EPS
Selection aid for batch processes
1-sided
control
2-sided
control
1 PWM
1
2
–
–
x1x0xxxxx
x1x0xxxxx
x1x2xxxxx
x1x0xxxxx
x1x0xxxxx
x1x0xxxxx
x1x0xxxxx
x1x2xxxxx
x1x0xxxxx
x1x0xxxxx
1
1
3
2
1
1
–
–
current output
1 PFM
1
1
2
1
–
–
–
–
1
1
3
2
–
–
–
–
2 PFM
2 PWM
1 three-PS
1 PWM/PFM
current output
1 three-PS
1 PWM/PFM
with
signal
with
signal
1
1
–
1
–
–
1
–
1
–
–
1
without
signal
without
signal
Required hardware equipment
for control
Ordering variants
CPM 153-
Process
Dosing actuators
Circuits
Relay
Current
inputs
Current
outputs
