Group 3 -- Functions And Timers - Danfoss VLT 2010 Manual

®
VLT Series 2000

Group 3 -- Functions and Timers

300 Brake Function (START FREQ)
Value:
Not Applied (NOT APPLIED)
Applied (APPLIED)
Function:
Using this parameter you can inform the VLT adjustable
frequency drive that a brake function and a brake resistor
have been connected.
Description:
Choose Applied if you use a brake function and a brake
resistor.
306 DC Braking Time (DC-BRAKE T)
Value:
0 to 60 sec.
Function:
Using this parameter you can record how long the DC
braking must be active
Description:
When you choose the braking time you must consider if you
want to maintain the braking torque or if you want to use a
stop function.
The DC braking time must be ≠ 0 to activate DC braking.
307 DC Brake Cut-in Frequency (DC-BRK ON)
Value:
0 to 500 Hz
Function:
Using this parameter you can record the output frequency
at which DC braking must start when ramping down to
standstill.
Description:
The cut-in frequency depends on the application. The cut-in
frequency must be ≠ 0 to activate DC braking. Instaed of
using this parameter you can activate DC braking via
terminal 27 if a DC braking time and a DC brake voltage
have been recorded.
= ROM default setting. Text in ( ) = display text.
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[0]
Using this parameter you can record the DC brake voltage
[1]
for the motor.
The size of the voltage depends on the motor size. The
bigger the motor the lower the DC brake voltage.
∆
0 sec.
Using this parameter you can choose how you want to
reset an alarm
If you choose Manual Reset you must reset the VLT
adjustable frequency drive via the keyboard or via terminals
19, 27, or 29. The display shows TRIP.
If you choose Auto Reset 1 the VLT will automatically try to
reset once after alarm. The display shows AUTO START.
1 Hz.
As long as the display shows AUTOSTART the unit will try
to reset every 20 minutes.
If you choose Auto Reset 5 thr VLT will automatically try to
reset 5 times after alarm. The display shows AUTO START.
∆
Figures in [ ] are used when communicating with the bus.
308 DC Brake Voltage (DC-BRK VOL)
Value:
0 to 50 V
Function:
Description:
WARNING: At frequent DC-braking the DC brake
voltage should not be too high. This is to avoid
!
motor overload. The DC brake voltage must be ≠
0 to activate DC braking.
309 Reset Function (RESET MODE)
Value:
Manual reset (MANUAL)
Automatic reset 1 (AUTO 1)
Automatic reset 5 (AUTO 5)
Function:
Description:
WARNING: The motor may start without warning.
!
Programming
10 V
[0]
[1]
[5]
25