Danfoss VLT AQUA Drive FC 202 Programming Manual page 122

Parameter Description
14-10 Mains Failure
Option:
3 3
[0] No
function
[1] Ctrl.
ramp-
down
[3] Coasting
[4] Kinetic
back-up
[6] Alarm
Illustration 3.45 Controlled Ramp Down - Short Mains Failure.
Ramping down to stop followed by ramping up to reference.
Illustration 3.46 Controlled Ramp Down, Longer Mains Failure.
Ramping down as long as the energy in the system allows for
it, then the motor is coasted.
Illustration 3.47 Kinetic Back-up, Short Mains Failure.
Ride through as long as the energy in the system allows for it.
120
Programming Guide
Function:
Select the function at which the frequency
converter must act, when the threshold set in
parameter 14-11 Mains Voltage at Mains Fault has
been reached or a Mains Failure Inverse command
is activated via one of the digital inputs
(parameter group 5-1*).
Only selection [0] No function, [3] Coasting or [6]
Alarm is available when parameter 1-10 Motor
Construction is set to [1] PM, non salient SPM.
The energy left in the capacitor bank will be used
to run the motor, but will be discharged.
The frequency converter will perform a controlled
ramp down. Parameter 2-10 Brake Function must
be set to [0] Off.
The inverter will turn off and the capacitor bank
will back up the control card then ensuring a
faster restart when mains reconnected (at short
power zags).
The frequency converter will ride through by
controlling speed for generative operation of the
motor utilizing the moment of inertia of the
system as long as sufficient energy is present.
DC Voltage
Output Speed rpm
Over Voltage Control Level
Par 14-11
Time
Mains
DC Voltage
Output Speed rpm
Over Voltage Control Level
Par 14-11
Time
Mains
DC Voltage
Output Speed rpm
Over Voltage Control Level
Par 14-11
Time
Mains
Danfoss A/S © Rev. 2014-01-21 All rights reserved.
DC Voltage
Output Speed rpm
Over Voltage Control Level
Par 14-11
Mains
Illustration 3.48 Kinetic Back-up, Longer Mains Failure.
The motor is coasted as soon as the energy in the system is
too low.
15-11 Logging Interval
Array [4]
Range: Function:
Size related [ 0 - 0 ] Enter the interval in ms between each
*
sampling of the variables to be logged.
15-12 Trigger Event
Option: Function:
Selects the trigger event. When the
trigger event occurs, a window is
applied to freeze the log. The log
then retains a specified percentage of
samples before the occurrence of the
trigger event
(parameter 15-14 Samples Before
Trigger).
[0] False
[1] True
[2] Running
[3] In range
[4] On reference
[5] Torque limit
[6] Current Limit
[7] Out of current range
[8] Below I low
[9] Above I high
[10] Out of speed range
[11] Below speed low
[12] Above speed high
[13] Out of feedb. range
[14] Below feedb. low
[15] Above feedb. high
[16] Thermal warning
[17] Mains out of range
[18] Reversing
[19] Warning
[20] Alarm (trip)
[21] Alarm (trip lock)
[22] Comparator 0
[23] Comparator 1
[24] Comparator 2
[25] Comparator 3
[26] Logic rule 0
[27] Logic rule 1
Time
MG20O702