25
★
= ROM default setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus.
VLT
®
Series 2000
Programming
Group 3 -- Functions and Timers
300 Brake Function (START FREQ)
Value:
★
Not Applied (NOT APPLIED)
[0]
Applied (APPLIED)
[1]
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.
★
0 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
★
1 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.
308 DC Brake Voltage (DC-BRK VOL)
Value:
0 to 50 V
★
10 V
Function:
Using this parameter you can record the DC brake voltage
for the motor.
Description:
The size of the voltage depends on the motor size. The
bigger the motor the lower the DC brake voltage.
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)
[0]
Automatic reset 1 (AUTO 1)
[1]
Automatic reset 5 (AUTO 5)
[5]
Function:
Using this parameter you can choose how you want to
reset an alarm
Description:
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.
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.
WARNING: The motor may start without warning.
∆
!
∆
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