Control Techniques Commander SE11200025 Guia Del Usuario página 64

No. Function
Voltage mode
48
selector
0 - Open-loop vector mode with static autotune each time the drive is run
1 - Open-loop vector mode with no static autotune
2 - Fixed boost mode
3 - Open-loop vector mode with static autotune the first time the drive is run
This parameter selects the voltage control mode which is used to set the voltage
characteristic to be applied to the motor. This falls into two categories:
Vector mode (parameter 48 set to 0, 1 or 3)
Fixed boost mode (parameter 48 set to 2)
A change to this parameter is only implemented when the drive is disabled or
NOTE
tripped.
Parameter 48 = 0: Open loop vector mode with static autotune
The drive carries out a static autotune to measure the motors stator resistance and the
system voltage offset every time the drive is run. This test can only be done with a
stationary motor where the flux has decayed to zero. Therefore this mode should only
be used if the motor is guaranteed to be stationary each time the drive is run. To prevent
the test from being carried out before the flux has decayed, there is a period of 2
seconds after the drive has been in the 'rd' state during which the test will not be done if
the drive is re-started. In this case, previously measured values are used.
Parameter 48 = 1: Open loop vector mode without static autotune
The motor stator resistance and the system voltage offset are not measured. If an
autotune is required, set parameter 38 to a 1 (static autotune) or 2 (rotating autotune).
Parameter 48 = 2: Fixed boost mode
The motor stator resistance and the system voltage offset are not used to determine the
output voltage characteristic. Instead, the boost voltage (parameter 49) and the motor
rated voltage (parameter 08) are used.
This mode should be used in a multiple motor application.
Parameter 48 = 3: Open loop vector mode with static autotune the first time the
drive is run
When the default parameters are set or this parameter is set to 3, the drive will carry out
a static autotune the first time the drive is run and then this parameter will be set to a 1
automatically.
When the drive is received from the factory, this parameter will be set to 3 so that
NOTE
a static autotune will be carried out automatically the first time the drive is run.
If the autotune test is passed, parameter 48 will automatically be a set to a 1. If the test
64
Type Limitations
RW
Output
voltage
Parameter 08
Parameter 08/2
Voltage boost
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Range Units
0 - 3
Output
Parameter Parameter
frequency
39 / 2 39
Commander SE User Guide
Defaults
3 EUR
3 USA
Issue Number 9