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VDL (E3.1) 10/2020 Page 82/196
8.5 Principle of controller entries
In the selection and entry menus there are icons displayed in the footers which you can use to take over
the entry or cancel it.
Selection menu (example)
Entry menu (example)
After completing the settings there are the following possibilities:
Press the Confirm icon to take over the entries and exit the menu or continue the menu se-
quence.
Press the Close icon to exit the menu or cancel the menu sequence without taking over the
entries.
When terminating a menu sequence, an information window appears, which must be con-
firmed.
8.6 Performance during and after power failures
During a power failure, all controller functions are shut down.
If there is a vacuum and ventilation is required during the duration of the power failure, this is possible via
the emergency ventilation (chap. 9.9.3).
After the power returns, all functions return to the same status the chamber had before power failure.
All settings and set point values remain in the memory during power failure.
• If the Standby mode had been activated prior to the power failure, the chamber remains off after the
power returns. To operate it you must sign in with a higher authorization level and deactivate the standby
mode.
• If the Standby mode had been deactivated prior to the power failure, operation continues after the power
returns with previously entered parameters. If the pressure reaches or falls below the required pressure
threshold of 100 mbar, the heater turns on depending on the setpoint.
After the power returns, the controller continues to function in the original operating mode it was in previ-
ously before the power failure occurred:
• Performance after power failure in Fixed value operation mode
All functions return to the same status the chamber had before power failure. The set-points are imme-
diately resumed.
• Performance after power failure during Timer operation
The set-points which had been active at the moment of program start are resumed. Program run con-
tinues.
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