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Operation
status
Description
Current low
The drive output current is below the limit set in
parameter 4-52 Warning Speed Low
.
DC hold
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 Current
.
DC stop
The motor is held with a DC current (
parameter 2-01 DC Brake Current
) for a specified time (
parameter 2-02 DC Brak-
ing Time
).
DC brake is activated in
parameter 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 corre-
sponding terminal is not active.
The DC brake is activated via serial communication.
Feedback
high
The sum of all active feedback is above the feedback limit set in
parameter 4-57 Warning Feedback High
.
Feedback
low
The sum of all active feedback is below the feedback limit set in
parameter 4-56 Warning Feedback Low
.
Freeze out-
put
The remote reference is active, which holds the present speed.
[20] Freeze Output
was selected as a function for a digital input (
parameter group 5–1* Digital Inputs
). The corre-
sponding terminal is active. Speed control is only possible via the terminal functions speed up and speed
down.
Hold ramp is activated via serial communication.
Freeze out-
put request
A freeze output command has been given, but the motor remains stopped until a run permissive signal is re-
ceived.
Freeze ref.
[19] Freeze Reference
was selected as a function for a digital input (
parameter group 5–1* Digital Inputs
). The corre-
sponding terminal is active. The drive saves the actual reference. Changing the reference is now only possible via
terminal functions speed up and speed down.
Jog request
A jog command has been given, but the motor is stopped until a run permissive signal is received via a digital
input.
Jogging
The motor is running as programmed in
parameter 3-19 Jog Speed [RPM]
.
[14] Jog
was selected as 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 was selected as a reaction for a monitoring function (for example, No signal). The monitoring
function is active.
OVC control
Overvoltage control was activated by
[2] Enabled
in
parameter 2-17 Over-voltage Control
. The connected motor is
supplying the drive with generative energy. The overvoltage control adjusts the V/Hz ratio to run the motor in
controlled mode and to prevent the drive from tripping.
Power unit
off
(For drives with a 24 V external supply installed only.) Mains supply to the drive is removed, but the control card is
supplied by the external 24 V.
Protection
md
Protection mode is active. The unit has detected a critical status (an overcurrent or overvoltage).
To avoid tripping, the switching frequency is reduced to 1.5 kHz if
parameter 14-55 Output Filter
is set to
[2]
Sine-Wave Filter Fixed
. Otherwise, the switching frequency is reduced to 1.0 kHz.
If possible, protection mode ends after approximately 10 s.
Protection mode can be restricted in
parameter 14-26 Trip Delay at Inverter Fault
.
AQ262139143212en-000301 / 130R0879 | 139
Danfoss A/S © 2021.10
Maintenance, Diagnostics, and
Troubleshooting
VLT® AutomationDrive FC 302
Operating Guide
Summary of Contents for D9h
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