GE Industrial Solutions DV-300 DC Drive Users Manual - Manual (Page 188)

GEI-100332Ga
——— FUNCTION DESCRIPTION ———
6
60
Undervoltage AC Input undervoltage.
In case of an AC Input voltage when the regulation is enabled (Enable drive = Enabled)
the message Undervoltage appears. The converter is immediately disabled. To this
purpose an intervention threshold is preset via the Undervolt thr parameter.
If the alarm is not saved (Latch=OFF), the drive tries to start automatically after the
voltage has been restored. Using the ramp, when the voltage is restored, if the function
Auto capture is active, the ramp output is set to the value corresponding to the current
motor speed. This avoids speed jumps.
Overvoltage Armature obervoltage. Ther message appears when the armature voltage exceeds the
value set via Max out voltage by 20%.
If the alarm is not saved (Latch = OFF), the drive will attempt to restart automatically
after the voltage has been restored.
Using the ramp, when the voltage is restored, if the function Auto capture is active, the
ramp output is set to the valyue corresponding tothe current motor speed. This asvoids
speed jumps.
Overspeed This alarm condition is signalled if the speed limit set in the Overspeed thr parameter
is exceeded..
Heatsink Heatsink temperature of the converter is too high
This alarm always initiates the disconnection of the device 10 seconds after the failure
has been detected (Latch=ON).
An external controller (PLC,etc.) can read the alarm via programmable output, RS485
or Bus and it can execute a controlled stop within a 10 second delay.
Overtemp motor Motor temperature (connection for thermistor:terminals 78 and 79).
External Fault External fault (no voltage on terminal 15)
Brake fault (See chapter 6.14.8) The DC drive has not managed to establish the selected torque
within the time specified by the Torque Delay parameter.
The brake feedback has not been received within the allowed time.
The brake feedback remains for 1 second after the closure order has been given to it.
Motor I2t ovrld If the Motor I2t accumulator parameter reaches 100% the relative alarm is signalled.
Drive I2t ovrld If the Drive I2t accumulator parameter reaches 100% the relative alarm is signalled.
Overcurrent Overcurrent (short-circuit / earth fault). The intervention point is determined by the
Overcurrent thr parameter. This can also be used as indication of threshold overpass
for system applications.
Field loss Too low field current. The intervention point corresponds to 50% of the min. field cur-
rent set with the Flux current min parameter. This alarm message is active with the
enabled converter (Enable drive=Enabled).
Delta frequency This alarm condition is active if the frequency of the three-phase power supply to the
drive exceeds the positive or negative percentage threshold set via the Delta freq thres
parameter. The power supply frequency (50 or 60 Hz) and thus the relative thresholds
are automatically calculated by the drive as soon as the three-phase power supply is
available.
Speed fbk loss No speed feedback available.
When Activity=Warning in the CONFIGURATION /Speed fbk menu is chosen, the
Enable fbk bypass parameter has to be set as “Enabled”, otherwise the drive reaches
an uncontrolled speed which can not be stopped.
Opt2 failure Failure on the card “Option 2” (optional).
Bus loss Failure in the connection on the field bus (only in connection with an option card of
bus interface).
Hw opt1 failure Failure on the card “Option 1” (optional).
Enable seq err Wrong drive enabling sequence. The correct sequence is as follows:
Case a: Main commands = Terminal
1 - Regulation board power-up: Enable terminal (term.12) in any state.