Operators Handbook DCU3 – System
3., Function Selection and Inputs
BAEDCU3 - Rev. 4.6 - 0504 3 - 7
3.1.5 Direct Function Keys
The direct function keys on right hand of the „Touch Terminal“ allow for direct access to the system:
SHUT DOWN : Pressingthis key sets all analog and digital outputs into a safe state. An active
SHUT DOWN state is indicated by lighting LED in the key. Repeatedly pressing the key
cancels (releases) the SHUT DOWN state and the system returns to its previous state.
ACK : If an alarm message occurs, a red LED in the ACK - key lights. Pressing the ACK - key then
enables the alarm menu on the display.
REM : Pressing the REMote control key allows for the transmission of data from the host to the
DCU system. Effective only if a host computer is connected to the DCU-system.
CHANGE UNIT : Switching-over of the operating terminal. Applicable for DCU3-system which are
prepared for controlling several fermentors/culture vessels.
3.2 Inputs
3.2.1 Numerical and Non-numerical Inputs
Example for entering numerical inputs, shown here for the temperature setpoint:
1. Press either the touch-key „Temp“ in the work-
ing area of the „main“ menu or the key “SETP”
in the menu TEMP Control Loop
A touch key pad fades in for data input.
2. Enter the new setpoint. For this consider the
permissible setpoint range, as indicated.
3. At erroneous inputs delete the entry with CAN-
CEL and enter the correct numbers.
4. Confirm the input with the „Ok“-key.
5. The system closes automatically the touch key
pad. The new setpoint is displayed.
Input of operating mode, i.e. controller modes:
1. Press the touch key „MODE“;
a window with the selectable modes fades in.
2. Press the touch key of the intended mode, i.e.
„off“.
3. At selection of a wrong mode, delete with CAN-
CEL and select again the correct mode
4. The selection window closes and the display
shows the new mode.
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