5.3
Motor / characteristic curve parameters
BU 0500 GB
Subject to technical alterations
81
Parameter
Set value / Description / Note
Device
Supervisor
Parameter
set
P220 Parameter
identification
P
... up to 240s
[ 0 ]
The motor data is automatically determined by the FI with this parameter. In most cases this leads
to considerably better drive characteristics, as DC asynchronous motors are subject to
manufacturing tolerances which are not documented on the rating plate.
The identification of all parameters takes some time. Do not switch off the mains voltage during
this time. The identification can only be carried out in an “operative” condition. This must be
particularly taken into account in BUS operation.
If unfavourable operating characteristics result, select a suitable motor in P200 or set the
parameters P201 … P208 manually.
0 = No identification
1 = Identification R
S
:
only the stator resistance (display in P208) is determined by multiple
measurements.
2 = Motor identification:
all motor parameters (P202, P203, P206, P208, P209) are
determined.
Procedure: a) The identification should be made with the motor cold. Warming up of the motor during
operation is taken into account.
b) The FI must be in an “operative condition” For BUS operation, the Bus must be operating
without error.
c) The motor power may only be one power level greater or 3 power levels lower than the
nominal power of the FI.
d) The motor data should be set according to the rating plate or P200. However, at least the
nominal frequency (P201), the nominal speed (P202), the voltage (P204), the power (P205)
and the motor circuit (P207) should be known.
e) If the identification cannot be concluded successfully, the error message E019 is generated.
See also Section 6, Error messages.
f) Reliable identification can be made with motor cables up 20m in length.
NOTE:
After identification of parameters, P220 is again = 0.
Care must be taken that the connection to the motor is not interrupted during the
entire measuring process.
