Performance During And After Power Failures - Binder VDL Series Operating Manual

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. 9.10.3).
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 pre-
viously 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 im-
mediately 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.
• Performance after power failure during Time program operation
The program is resumed at the point where the interruption occurred with the latest set-points reached
during the program run.
• Performance after power failure during Week program operation
The week program continues with the values corresponding to the current time.
Power failure and power return are noted in the Event list (chap. 13.5).
If during power failure an alarm has occurred (e.g., tolerance range, safety controller), confirm the alarm.
See chap. 16.3.
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