Danfoss VLT AutomationDrive FC 301 Operating Instructions Manual page 40

Maintenance, Diagnostics an...
Braking
Braking max.
Coast
Ctrl. ramp-down [1] Control Ramp-down was selected in
7 7
Current High
Current Low
DC Hold
DC Stop
Feedback high
Feedback low
38
Operating Instructions
The brake chopper is in operation. Generative
energy is absorbed by the brake resistor.
The brake chopper is in operation. The power
limit for the brake resistor defined in
2-12 Brake Power Limit (kW) has been reached.
•
Coast inverse was selected as a function for
a digital input (parameter group 5-1*
Digital Inputs). The corresponding terminal
is not connected.
•
Coast activated by serial communication.
14-10 Mains Failure.
•
The mains voltage is below the value set
in 14-11 Mains Voltage at Mains Fault at
mains fault
•
The frequency converter ramps down the
motor using a controlled ramp down.
The frequency converter output current is
above the limit set in 4-51 Warning Current
High.
The frequency converter output current is
below the limit set in 4-52 Warning Speed Low.
[1] 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).
•
The DC Brake cut in speed is reached 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.
Danfoss A/S © Rev. 07/2014 All rights reserved.
Freeze output 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 Speed
Down.
•
Hold ramp is activated via serial communi-
cation.
Freeze output A freeze output command was given, but the
request motor remains stopped until a run permissive
signal is received.
Freeze ref. Freeze Reference was selected as a function for
a digital input (parameter group 5-1* Digital
Inputs). The corresponding terminal is active.
The frequency converter saves the actual
reference. Changing the reference is now only
possible via terminal functions Speed Up and
Speed Down.
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 a 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, [2] Motor Check was
selected. A stop command is active. To ensure
that a motor is connected to the frequency
converter, a permanent test current is applied
to the motor.
OVC control Overvoltage control was activated in
2-17 Over-voltage Control, [2] Enabled. The
connected motor supplies the frequency
converter with generative energy. The
overvoltage control adjusts the V/Hz ratio to
run the motor in controlled mode and to
prevent the frequency converter from tripping.
PowerUnit Off (Only frequency converters with an external
24 V power supply installed).
Mains supply to the frequency converter was
removed, and the control card is supplied by
the external 24 V.
MG33AP02