Motor Data Identification; Magnetizing Current - Siemens MICROMASTER 440 Operating Instructions Manual

6 Commissioning
6.2

Motor data identification

START
P0625 = ?
| Motor temp. - P0625|
≤ 5 °C ?
yes no
Allow the motor
to cool down
P1910 = 1
A0541
ON
OFF1
P1910 = 3
A0541
ON
OFF1
END
6.3

Magnetizing current

The value of the magnetizing current r0331/P0320 has a significant influence on
the closed-loop control. This cannot be measured at standstill. This means that
the value is estimated for standard 4-pole 1LA7 Siemens standard using the
automatic parameterization P0340=1 (P0320=0; result in r0331).
If the deviation of the magnetizing current is too high, then the values for the
magnetizing reactance and those of the rotor resistance will not be able to be
accurately determined.
Especially for third-party motors it is important that the magnetizing current
that is determined, is carefully checked and if required, appropriately corrected.
32
Ambient motor temperature (entered in °C)
The motor ambient temperature is entered at the instant that motor data is
being determined (factory setting: 20 °C).
The difference between the motor temperature and the motor ambient
temperature P0625 must lie in the tolerance range of approx. ± 5 °C. If this is
not the case, then the motor data identification routine can only be carried-out
after the motor has cooled down.
Select motor data identification with P1910 = 1
p1910 = 1: Identifies the motor parameter with parameter change.
These are accepted and applied to the controller.
When p1910 = 1 is selected, Alarm A0541 (motor data identification active)
is output, and internally p0340 is set to 3.
Starts the motor data identification run with p1910 = 1
The measuring operation is initiated with the continuous (steady-state) ON
command. The motor aligns itself and current flows through it. Diagnostics is
possible using r0069 (CO: Phase current).
After the motor data identification routine has been completed, p1910 is reset
(p1910 = 0, motor data identification routine inhibited) and Alarm A0541 is
cleared (deleted).
In order to set the frequency converter into a defined state, an OFF1 command
must be issued before the next step.
Select motor data identification with P1910 = 3
p1910 = 3: Identifies the saturation characteristic with parameter change.
When p1910 = 3 is selected, Alarm A0541 (motor data identification active)
is output and internally, p0340 is set to 2.
Starts the motor data identification run with P1910 = 3
The measuring operation must be started with a continuous ON command.
After the motor identification routine has been completed, p1910 is reset
(p1910 = 0, motor data identification routine inhibited) and Alarm A0541 is
cleared (deleted).
In order to set the frequency converter into a defined state, an OFF1 command
must be issued before the next step.
Issue 10/06
Factory setting
20 °C
0
0
MICROMASTER 440
Operating Instructions (Compact)