Elmo DBP SERIES 用户手册

DBP - Rev 6/93

4.7 Protective functions

All the protective functions except "Low Back-up Battery Voltage" activate

an interrupt to the main processor which inhibits the power bridge and disable

current flow to or from the motor. The user can interrogate the processor in

order to verify the cause of the inhibit. An indication of the fault will

appear on the display. The following protections are processed by the DCB:

4.7.1 Short circuit protection

The amplifier is protected against shorts between outputs, or either output

to ground, or either output to the positive supply line.

4.7.2 Under/over voltage protection

Whenever the DC bus voltage is under or over the limits indicated in the

technical specifications, the amplifier will be inhibited.

4.7.3 Temperature protection

Temperature sensor is mounted on the heatsink. If, for any reason, the

temperature exceeds 85

C the amplifier will be inhibited. The amplifier will

restart when the temperature drops below 80

C. The user can always interrogate

the DCB about the heatsink temperature by using the command T?.

4.7.4 Internal power supply failure

In any case that the sum of the internal power supplies is below 13V or its

difference higher than 1V, the amplifier will be inhibited.

4.7.5 Loss of commutation feedback

Lack of either of the commutation signals will inhibit the amplifier.

4.7.6 Low back-up Battery voltage

When the battery voltage goes below 2.4V the DCB will send a message on the

communication line and will display "BATT" on the display.