Operating instructions

Commissioning (software)
2.7 Commissioning modes
Control Units CU240S
2-28 Operating Instructions (Compact), 04/2006, A5E00766042B AA
Note
The equivalent circuit data (P0350, P0354, P0356, P0358, P0360), with the exception of
parameter P0350, should be entered as phase values. In this case, parameter P0350 (line-
to-line value) corresponds to twice the phase value.
The motor cable resistance P0352 is defined as a phase value.
During the motor identification routine, the stator resistance and the motor cable resistance
are determined and entered into parameter P0350. If a correction is made in parameter
P0352, then the Inverter defines the motor cable resistance using the following relationship:
P0352 = 0.2 * P0350.
If the motor cable resistance is known, then the value can be entered into parameter P0352
after the motor data identification. The stator resistance is appropriately reduced as a result
of this entry and is therefore more precisely adapted to the actual application.
It is not necessary to lock the motor rotor for the motor data identification routine. However, if
it is possible to lock the motor rotor during the identification routine (i.e. by closing the motor
holding brake), then this should be used to determine the equivalent circuit diagram data.
The following formula can be applied to check the correctness of the motor rating plate data:
P
N
= √3 ∗ V
NΥ
∗ I
NΥ
∗ cosϕ ∗ η ≈ √3 ∗ V
NΔ
∗ I
NΔ
∗ cosϕ ∗ η
Where:
P
N
rated motor power
V
N Υ
, V
N Δ
rated motor voltage (star/delta)
I
N Υ
, I
N Δ
rated motor current (star/delta)
cosϕ power factor
η efficiency
If Problems occur during the identification run, for example, the current controller oscillates,
then the rating plate data should be re-checked and an approximately correct magnetizing
current P0320 entered. The motor data identification routine should then be re-started by
called P0340 = 1.