Danfoss VLT AutomationDrive FC 301 Operating Instructions Manual page 40

Maintenance, Diagnostics, a...
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
VLT
The brake chopper is in operation. The power
limit for the brake resistor defined in
parameter 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.
parameter 14-10 Mains Failure.
•
The mains voltage is below the value set
in parameter 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 parameter 4-51 Warning
Current High.
The frequency converter output current is
below the limit set in parameter 4-52 Warning
Speed Low.
[1] DC hold is selected in
parameter 1-80 Function at Stop and a stop
command is active. The motor is held by a DC
current set in parameter 2-00 DC Hold/Preheat
Current.
The motor is held with a DC current
(parameter 2-01 DC Brake Current) for a
specified time (parameter 2-02 DC Braking
Time).
•
The DC brake cut in speed is reached in
parameter 2-03 DC Brake Cut In Speed [RPM]
and a stop command is active.
•
[5] 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 parameter 4-57 Warning
Feedback High.
The sum of all active feedbacks is below the
feedback limit set in parameter 4-56 Warning
Feedback Low.
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®
AutomationDrive FC 301/302
Freeze output
Freeze output
request
Freeze ref.
Jog request
Jogging
Motor check
OVC control
PowerUnit Off
The remote reference is active, which holds
the present speed.
•
[20] Freeze output is 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 options [21] Speed up and [22]
Speed down.
•
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.
[19] Freeze reference is 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 options [21]
Speed up and [22] Speed down.
A jog command was given, but the motor
remains stopped until a run permissive signal
is received via a digital input.
The motor is running as programmed in
parameter 3-19 Jog Speed [RPM].
•
[14] Jog was selected as a function for a
digital input (parameter group 5-1* Digital
Inputs). The corresponding terminal (for
example, terminal 29) is active.
•
The jog function is activated via the serial
communication.
•
The jog function is selected as a reaction
for a monitoring function (for example, for
the no signal function). The monitoring
function is active.
In parameter 1-80 Function at Stop, [2] Motor
Check is 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.
Overvoltage control is activated via
parameter 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.
(Only frequency converters with a 24 V
external supply installed).
Mains supply to the frequency converter was
removed, and the control card is supplied by
the external 24 V.
MG33AQ02