Danfoss VLT AutomationDrive FC 301 Instruction Manual page 40

Diagnostics and Troubleshoo...
Ctrl. Ramp-down Control Ramp-down was selected in
Current High
Current Low
DC Hold
7 7
DC Stop
Feedback high
Feedback low
Freeze output
Freeze output
request
38
Instruction Manual
14-10 Mains Failure.
•
The AC line voltage is below the value set
in 14-11 Mains Voltage at Mains Fault at
line power fault
•
The adjustable frequency drive ramps
down the motor using a controlled ramp-
down.
The adjustable frequency drive output current
is above the limit set in 4-51 Warning Current
High.
The adjustable frequency drive output current
is below the limit set in 4-52 Warning Speed
Low.
DC Hold is selected in 1-80 Function at Stop
and a stop command is active. The motor is
held by a DC current set in 2-00 DC Hold/
Preheat Current.
The motor is held with a DC current (2-01 DC
Brake Current) for a specified time (2-02 DC
Braking Time).
•
DC Brake is activated in 2-03 DC Brake Cut-
in Speed [RPM] and a stop command is
active.
•
DC Brake (inverse) is selected as a function
for a digital input (parameter group 5-1*
Digital Inputs). The corresponding terminal
is not active.
•
The DC Brake is activated via serial
communication.
The sum of all active feedbacks is above the
feedback limit set in 4-57 Warning Feedback
High.
The sum of all active feedbacks is below the
feedback limit set in 4-56 Warning Feedback
Low.
The remote reference is active, which holds
the present speed.
•
Freeze output was selected as a function
for a digital input (parameter group 5-1*
Digital Inputs). The corresponding terminal
is active. Speed control is only possible via
the terminal functions Speed Up and Slow.
•
Hold ramp is activated via serial communi-
cation.
A freeze output command was given, but the
motor remains stopped until a run permissive
signal is received.
Danfoss A/S © Rev. 2014-02-10 All rights reserved.
Freeze ref. Freeze Reference was chosen as a function for
a digital input (parameter group 5-1* Digital
Inputs). The corresponding terminal is active.
The adjustable frequency drive saves the
actual reference. Changing the reference is
now only possible via terminal functions
Speed Up and Slow.
Jog request A jog command was given but the motor
remains stopped until a run permissive signal
is received via a digital input.
Jogging The motor is running as programmed in
3-19 Jog Speed [RPM].
•
Jog was selected as function for a digital
input (parameter group 5-1* Digital Inputs).
The corresponding terminal (e.g., Terminal
29) is active.
•
The Jog function is activated via the serial
communication.
•
The Jog function was selected as a
reaction for a monitoring function (e.g., No
signal). The monitoring function is active.
Motor check In 1-80 Function at Stop, Motor Check was
selected. A stop command is active. To ensure
that a motor is connected to the adjustable
frequency drive, a permanent test current is
applied to the motor.
Over Voltage Overvoltage control was activated in 2-17 Over-
Control (OVC) voltage Control, [2] Enabled. The connected
motor is supplying the adjustable frequency
drive with generative energy. The overvoltage
control adjusts the V/Hz ratio to run the
motor in controlled mode and to prevent the
adjustable frequency drive from tripping.
PowerUnit Off (Only adjustable frequency drives with an
external 24 V power supply installed).
Line power supply to the adjustable frequency
drive was removed, and the control card is
supplied by the external 24 V.
Protection md Protection mode is active. The unit has
detected a critical status (overcurrent or
overvoltage).
•
To avoid tripping, switching frequency is
reduced to 4 kHz.
•
If possible, Protection mode ends after
approximately 10 s.
•
Protection mode can be restricted in
14-26 Trip Delay at Inverter Fault.
MG33AN22