Sartorius DCU 3, Operator'S Handbook Manual

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Operators Handbook DCU3 – System
2., Operating Behaviour
BAEDCU3 - Rev. 4.6 - 0504 2 - 2
2.3 Shut Down Function
The shut down function can be released by :
Enabling the „SHUT DOWN“ key on the operating terminal and
Enabling the mains switch of the fermentor (located on the supply unit or cabinet).
In the shut down state all outputs are switched over to their predefined safe state. Other active func-
tions of controllers, timers, profiles, recipes and sterilization are not effected.
During the SHUT DOWN state you can change any of the active functions, as required.
If the SHUT DOWN state is enabled, the DCU3 - system displays the alarm message „Shut
Down DCU“ or „SHUT DOWN FERMENTOR“
Pressing the „SHUT DOWN“ key again or restarting the fermentor supply unit with the emergency
switch terminates the shut down function. Then all outputs of the DCU are reactivated.
2.4 Interlocking Functions
Interlocking functions trigger the outputs for functions which are important for operational safety, i.e.:
Fixed safety functions which cannot be changed by the user.
User-definable safety functions.
An interlocking function switches certain outputs of the DCU3 over into their predefined safety state.
However, this will not effect the course of controllers, timers, profiles, recipes and of the sterilization.
For details about specific functions see section „Interlocking functions“ in the supplement.
If the cause for release of an interlocking function is no longer present, the safety state of the corre-
sponding output will be cancelled and the output returns into its operating state.
The safety state of an output is the same as the state during SHUT DOWN.
The state of the output displayed in the menu „MAINTENANCE, MANUAL OPERATION,
DIGITAL OUTPUTS“ and „ANALOG OUTPUTS“ is „lock“.