Danfoss VLT HVAC Drive Instruction Manual page 6

GROUP 3 – Third (right) word: Operation Status
Operation status
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*
Freeze output
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 communication.
Freeze output
A freeze output command has been given, but the motor remains stopped until a run
request permissive signal is received.
19 Freeze Reference was selected as a function for a digital input. The corresponding
Freeze ref.
terminal is active. The drive saves the actual reference. Changing the reference is now only
possible via terminal functions speed up and speed down.
A jog command has been given, but the motor is stopped until a run permissive signal is
Jog request
received via a digital input.
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.
Jogging
• 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.
In par. 14‐10 Mains Failure a function was set as Kinetic back‐up. The Mains Voltage is below
Kinetic back‐up
the value set in par. 14‐11 Mains Voltage at Mains Fault. The FC is running the motor
momentarily with kinetic energy from the inertia of the load.
In parameter 1‐80 Function at Stop, 2 Motor Check was selected. A stop command is active.
Motor check
To ensure that a motor is connected to the drive, a permanent test current is applied to the
motor.
PROFIDrive profile was selected in par. 8‐10 Control Word Profile. Via serial communication
Off1
the OFF 1 function is activated. The Motor is stopped via the ramp.
PROFIDrive profile was selected in par. 8‐10 Control Word Profile. Via serial communication
Off2
the OFF 2 function is activated. The output of the FC is disabled immediately, and the motor
coasted.
PROFIDrive profile was selected in par. 8‐10 Control Word Profile. Via serial communication
Off3
the OFF 3 function is activated. The Motor is stopped via the ramp.
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
OVC control
adjusts the V/Hz ratio to run the motor in controlled mode and to prevent the drive from
tripping.
(For drives with a 24 V external supply installed only.) Mains supply to the drive is removed,
Power unit off
but the control card is supplied by the external 24 V.
Pre‐magnetization is selected in par. 1‐80 Function at Stop. A stop command (e.g. Stop
Premagnetise
inverse) is activated. A suitable constant magnetizing current is applied to the Motor.
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
Protection md
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.
The motor is decelerating using parameter 3‐81 Quick Stop Ramp Time.
• 4 Quick stop inverse was selected as a function for a digital input (parameter group 5–1*
QStop
Digital Inputs). The corresponding terminal is not active.
• The quick stop function was activated via serial communication.
Description
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