5. Commissioning
MV3DB Series DB Units
ALSPA MV3000e Dynamic Braking Units
(07/06)
Page 5-2
–
Check the drive accepts that the DB Unit is connected. This is done by using Drive
Data Manager™ (Keypad) or a PC using ALSPA Drive Coach™, to monitor
parameter P11.33 and checking that bit 6 of the displayed binary string (Status Flag
54) is set to 1.
–
Check the drive accepts that the braking resistor is “healthy” i.e. not too hot. This is
done by monitoring Parameter P11.33 and checking that bit 7 of the displayed
binary string (Status Flag 55) is set to 1.
–
Using a Keypad or a suitable PC, configure the relevant drive parameters to
operate the drive with DB Unit, as described in Section 5.3.
Run the drive.
–
Check that on motor deceleration, the DB Unit switches on/off when the requested
deceleration rate is faster than the free-wheel deceleration rate of the motor.
After commissioning the drive system, check that the duty cycle of the DB Unit is within the
limits detailed in Section 2 (Specifications).
5.3 Drive
Parameters
Several ALSPA MV3000e drive parameters must be configured to allow correct operation of
the DB Unit with a drive. Access to menus and parameters is described in the relevant ALSPA
MV3000e Getting Started Manual. The drive is set up using a Keypad, or using a suitable PC
and appropriate software such as ALSPA Drive Coach.
The values to be entered for these parameters allow the drive to safely operate the dynamic
brake and associated braking resistor.
Parameter 23.00 - DB Resistor Value
Enter the resistance of the fitted braking resistor.
Permitted values:
0.1
Ω
to 1000.0
Ω
Parameter 23.01 - DB Resistor Average Power
Enter the average value of the power to be dissipated by the braking resistor, this being a
measure of its continuous capability. The default value is drive dependent.
Permitted values:
0.1kW to 3000.0 kW
If a resistor listed in
Error! Reference source not found.
is used, P23.01 should be set to
10% of the “Nominal Power during 18 seconds ON time” given in that table.
Parameter 23.02 - DB Resistor Maximum Power
Enter the maximum value of the power to be dissipated by the braking resistor. This
parameter, in conjunction with P23.03, is a measure of its overload capability. The default
value is drive dependent. Range of permitted values:
From value in P23.01 to 3000.0 kW
If a resistor listed in Table 2-1 is used, P23.01 should be set equal to the “Nominal Power
during 18 seconds ON time” given in that table.
