Operating instructions

5. SYSTEM PARAMETERS International English
MICROMASTER 420 Operating Instructions 81
6SE6400-5AA00-0BP0
Parameter
Number
Parameter Name
Min
Max
[Default]
Units
♦
♦♦
♦P0003 User
Access Level
♦
♦♦
♦P0004 Setting
♦
♦♦
♦Changeable
♦
♦♦
♦Status
Notes
Setting the Starting Boost too high will cause the inverter to go into Current Limit, which in
turn restricts the output frequency to below the setpoint frequency.
Increasing the Boost Levels increases the heating of the motor.
Refer to note in P1310 with respect to Boost priorities.
The achievable boost value is limited by the setting in P0640.
Σ Boosts < 300/I
mot
* R
S
Slip compensationP1335
Adjusts the output frequency of the inverter dynamically, so that the motor speed is kept
constant independent of the motor load.
0% = Slip compensation disabled
100% = This uses the motor data and motor model such that rated
slip frequency is added at rated motor speed and current.
Note
The gain value can be adjusted if necessary to fine-tune the actual motor speed.
0
600
[0]
%
2
13
‘•’
Slip limitP1336
Limits the compensation slip added to the frequency setpoint when slip compensation is
active.
0
600
[250]
%
2
13
‘•’
Pulse frequency
Sets the pulse frequency of the power switches in the inverter. The frequency can be
changed in steps of 2 kHz.
If silent operation is not absolutely necessary, it is possible to reduce inverter losses and
radio-frequency emissions by selecting lower pulse frequencies.
The maximum continuous motor current will be reduced if pulse frequencies > 4kHz are
selected on 380-480V units. The required derating is shown in the table below.
Maximum continuous motor current (A) for 380-480V units
Inverter
Power
4 kHz 6 kHz 8 kHz 10 kHz 12 kHz 14 kHz 16 kHz
0.37 1.2 1.2 1.2 1.2 1.2 1.2 1.1
0.55 1.6 1.6 1.6 1.6 1.6 1.6 1.1
0.75 2.1 2.1 2.1 2.1 1.6 1.6 1.1
1.1 3.0 3.0 2.7 2.7 1.6 1.6 1.1
1.5 4.0 4.0 2.7 2.7 1.6 1.6 1.1
2.2 5.9 5.9 5.1 5.1 3.6 3.6 2.6
3 7.7 7.7 5.1 5.1 3.6 3.6 2.6
4 10.2 10.2 6.7 6.7 4.8 4.8 3.6
5.5 13.2 13.2 13.2 13.2 9.6 9.6 7.5
7.5 18.4 18.4 13.2 13.2 9.6 9.6 7.5
P1800
11 26.0 26.0 17.9 17.9 13.5 13.5 10.4
2
16
[4]
kHz
2
2
‘•’