Burkert Type 8620 - Manual (Page 96)

mxCONTROL Type 8620
Page 96
On/Off-Controller
The On/Off-Controller is used to control simple on/off-outputs, e.g. a bleed valve. The On/Off-controller
outputs either 0 % (off) or 100 % (on), depending on the current process value and the internal state of
the controller (see Figure 36).
The controller sense of action is reversible. Usually the sense of action is normal (not inversed).
The sense of action can be changed in the configuration menu or with the configuration file.
Figure 36:
Sense of action of the
modules
COND_CONTROL
and
COND_CONTROL_RATIO
Output Override
The output of this module is influenced at certain states (see figure).
Figure 37: Output override (COND_CONTROL)
"Biocide dosing" override
If the link between conductivity module and "Biocide Dosing" module is configured correctly, the
"Biocide Dosing" module will override the conductivity controller output with 0 %
after finishing
or skipping the pre-bleed phase.
This means, the conductivity controller will not work in the following phases of biocide dosing:
• main dose,
• delay after main dose
• post
dose
• delay after post dose.
Only one of the Conductivity modules can be connected with the “Biocide Dosing” module!