JUMO dTRANS CR 02, Operating Manual, Page: 99 / 120

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16 Appendix
to the control deviation. When the proportional range is exceeded, the
controller operates with an output level of 100 % (100 % clock ratio).
Pulse frequency controller (output active with x > w and P control structure)
If actual value x exceeds setpoint W, the P controller will control in proportion
to the control deviation. When the proportional range is exceeded, the
controller operates with an output level of 100 % (maximum switching
frequency).
Special controller functions: Separate controllers
This function is normally deactivated (factory setting or select "No").
In the deactivated state, the software prevents the two controller outputs from
being able to work "against each other". So, for example, it is not possible to
dose acid and lye at the same time.
If the controllers are separate ("Yes" selection), each controller can be freely
configured.
Switch-off of the I-component
This function is normally deactivated (factory setting or select "No").
In the deactivated state, the controller works in accordance with general
controller theory.
When I-component switch-off is activated ("Yes" selection), the part of the
output level that can be traced back to the I-component is set to zero when
the setpoint is reached.
This can be useful with mutual neutralization (acid and lye dosing both
possible) in one treatment tank.
Calibration timer
The calibration timer indicates (on request) a required routine calibration. The
calibration timer is activated by entering the number of days that must expire
before there is a scheduled re-calibration (specified by the system or the
operator).
Wash timer
The wash timer can be used to implement automated sensor cleaning. To do
this, the function is assigned to a switching output.
100%
50%
0%
No pulses
50% of pulse frequency
Maximum pulse frequency
Setpoint W
Proportional band X
P
X
P
X - W
0 1
Output level y
Process value X