AC Brake
AC Brake was selected in 2-10 Brake Function.
The AC brake overmagnetizes the motor to
achieve a controlled slow-down.
AMA finish OK Automatic motor adaptation (AMA) was
carried out successfully.
AMA ready AMA is ready to start. Press [Hand On] to start.
AMA running AMA process is in progress.
Braking The brake chopper is in operation. Generative
energy is absorbed by the brake resistor.
Braking max. 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
•
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.
Ctrl. ramp-down
[1] Control Ramp-down was selected in
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.
Current High The adjustable frequency drive output current
is above the limit set in 4-51 Warning Current
High.
Current Low The adjustable frequency drive output current
is below the limit set in 4-52 Warning Speed
Low.
DC Hold
[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.
DC Stop
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.
Feedback high The sum of all active feedbacks is above the
feedback limit set in 4-57 Warning Feedback
High.
Feedback low The sum of all active feedbacks is below the
feedback limit set in 4-56 Warning Feedback
Low.
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 Slow.
•
Hold ramp is activated via serial communi-
cation.
Freeze output
request
A freeze output command was given but the
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 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 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 adjustable
frequency drive, a permanent test current is
applied to the motor.
Over-voltage
Control (OVC)
Over-voltage control was activated in
2-17 Over-voltage Control, [2] Enabled. The
connected motor supplies the adjustable
frequency drive with generative energy. Over-
voltage control adjusts the V/Hz ratio to run
the motor in controlled mode and to prevent
the adjustable frequency drive from tripping.
Maintenance, Diagnostics an... Instruction Manual
MG33AP22 Danfoss A/S © Rev. 09/2014 All rights reserved. 39
7 7
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