Burkert Type 8620 - Manual (Page 100)

mxCONTROL Type 8620
Page 100
Output converter
Normally, the module output CMD for the selection of actuators is only looped through the output
converter and directed directly to the real output linked via module output 1.
However, the module "COND_PI" is also provided for controlling a motorized (bleed) valve by means
of a time controlled 3-point-step-output. For this purpose, the CMD module output is converted in
the output converter with the appropriate configuration and divided to module output 1 (close) and
module output 2 (opening). The settings of the 3-point-step-output can be accessed in the "Parameter"
menu.
Output Override
The output of this module is influenced at certain states (see figure).
Figure 41: Output override (COND_PI)
"Biocide dosing" override
Refer to the description on "Biocide Dosing" override in the section " Output Override" of chapter
14.3.1
Maximum Output Timer (MOT)
This function monitors the controller output in automatic mode. If the controller output puts out the
Maximum Output Timer longer than the defined max. output time (+Tm), an "Out fails" alarm is put
out and the general alarm output is enabled.
The internal timer counting the period of the maximum control output will be reset if the control output
is smaller than the maximum control output and the alarm has not yet been triggered. The maximum
output is determined by the parameter "Upper output limit Lim+".
The Maximum Output Timer can be enabled/disabled through the configuration. For a general
description of the MOT refer to chapter 14.1.5.
Total Dissolved Solids (TDS)-Display
Please refer to the description on "Total Dissolved Solids (TDS)-Display" in chapter 14.3.1
The controller output will not be influenced by the alarm. The alarm message has to be
acknowledged by the operator on the device, even if the operating mode was changed.