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© Brüel & Kjær Vibro
● C107759.002 / V03
Page 21 of 22
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Brüel & Kjær Vibro
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Instruction VCM-3 On-Site Commissioning
Appendix 2: Power Up/Down and
Reboot
EN
UNRESTRICTED DOCUMENT
6
Appendix 2: Power Up/Down and Reboot
When the 24V power supply is connected, the VCM-3 will automatically boot up, the boot process is
complete when the Boot status LED shows constant green light. If the VCM-3 shall be powered down
or powered up, the normal procedure listed below is to use the Power Up/Down button named Push
10 sec.
Power Up procedure
Action
Boot Status LED
Explanation
Connection of power
to the unit
Supply voltage is out of spec. Input voltage is in the 4,5 to 18V
range.
Power is connected and within specifications.
Press the power
switch
Keep the switch pressed for 6-9 seconds. Release the switch
when the LED start flashing green.
During boot the LED will be flashing green.
Once the LED turns to solid green the unit starts running.
Power Down procedure
Action
Boot Status LED
Explanation
Power Down
(Normal)
Press the power
switch for 3 seconds.
Soft Power down will close down the VCM-3 in an orderly
manner where it is ensured that all data is stored in non-volatile
memory before power is taken off.
Push the button for approximately 3 sec. until the Boot Status
LED starts flashing orange/green. Release the button. The
power down is now in progress.
When the button turns into constant orange light, all data has
been saved and the power plug can be removed/power can be
turned off.
To boot up from this state follow the Power Up procedure
described below.
Hard Power Down
(On error conditions)
Hard Power Down corresponds to pulling the power plug. This
can be applied in case the VCM-3 ends in a state where the
watchdog has stopped the VCM-3 operation due to an error in
one of its services. (System LED lights red)
Keep pushing the button for approximately 10 sec. until the Boot
Status LED starts flashing Red/White.
Release the button.
The Boot Status now turns into constant orange light.
To boot up from this state follow the Power Up procedure
described below.