Operators Handbook DCU3 – System
6., Main function „Control Loops“
BAEDCU3 - Rev. 4.6 - 0504 6 - 3
6.3 Controller Operation in General
In general the operation of the DDC-controller is almost the same. Operation includes the necessary
changes of the setpoints, of the controller modes and of the controller outputs. Additional controller
settings not required for routine operation, will be done via the parametrization functions.
6.3.1 Operating Display (Example for Temperature Controller)
Tag Entry Displayed value or function, required input
TEMP, etc [PV] Display of physical unit of actual value, such as „degC“ for TEMP,
„rpm“ for STIRR, „pH“ for pH-value, „% sat“ for O
2
saturation, etc.
SETP [PV] Input of setpoint in the physical unit of the process value, such as
„degC“ for TEMP, „rpm“ for STIRR, „pH“ for pH-value, etc.
MODE Input of controller mode
off
− master controller and servo controller switched off
auto
− master controller on, servo controller switched to „cascade“ mode;
cascade
− servo controller operating in cascade mode (only some controllers)
profile
− timer profile for setpoint running (only some controllers)
manual
− manual access to controller output;
OUT % Display of controller output in [%]; inputs possible in mode „manual
PARAM Input of password for access to controller parameter
PV ALARM Enabling the alarm display
PROFILE request for setpoint profile
CALIB request for calibration function (only some controllers)
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