System reliability Part A VC 6000
TM
Compact monitor
© VC 6000
TM
Compact monitor Juni 2014 C100575.002 Introduction Vers.10 - 20 -
8.3.4 Instrument conduct after a power failure
If there is a power failure the VIBROCONTROL 6000 Compact monitor will
be shut down and thus the monitoring function as well. In this case a
Logbook entry is always recorded.
After restoration of the power the VIBROCONTROL 6000 Compact monitor
re-initialises and auto-matically resumes its monitoring functions. A Logbook
entry is also recorded.
Alarm signals that existed before the power failure will only be recorded in
the Logbook and will no longer exist, i.e. a system cold start always effects a
complete reset of the VIBROCONTROL 6000 Compact monitor .
♦ Redundant power supply
To reduce the risk of power drop-outs of the VIBROCONTROL 6000
Compact monitor
, a second external power supply should be connected
to entrance connector X23. (Connection details can be found in section
B.) If the primary power fails this will be signalled over the message
management Prim. Power Fail (Pin 5) and Sec. Power Fail (Pin 6)). An
entry will be recorded in the Logbook. The second power supply will
take over supplying power to the VIBROCONTROL 6000 Compact
monitor. The monitoring function can then continue without interruption.
♦ Signalling of the power supply by LED
In the area of connector X23 for the redundant power supply you will
see a green LED. This LED signals the system status. This LED signals
the status of the power supply. If the LED is off there is a fault in the
power supply.
8.3.5 Error signalling through the DC output
An error in the signal path (saturation, sensor OK-fault) is signalled through
the DC output. The output value in case of an error is set to a fixed value
corresponding to the selected parameter setting, whereby a distinction must
be made between two different cases:
1. Signal output 4...20 mA / 2...10 V:
If an error occurs the output signal will drop to 2 mA or 1V.
2. Signal output 0...20 mA / 0...10 V:
If an error occurs the current output value will drop to 0 mA or 0 V
Further information about DC outputs can be found in section B – Module
Technical Data and section B – Components (DC-output block)
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