Parameter and variable descriptions – Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE User Manual
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PARAMETER AND VARIABLE DESCRIPTIONS
1557-UM050F-EN-P – June 2013
Rated Motor rpm [Rated motor rpm]
Linear number:
26
Minimum value:
150.0 rpm
Maximum value:
3600.0 rpm
Default value:
1185.0 rpm
This parameter specifies the rated full load speed of the motor in rpm. It is equal to synchronous speed for a
synchronous motor and slightly less than synchronous speed for an induction motor. A “rated rpm” warning will
be displayed if this parameter is entered incorrectly.
Rated Motor Frequency [Rated motor freq]
Linear number:
29
Minimum value:
40 Hz
Maximum value:
90 Hz
Default value:
60 Hz
This parameter specifies the frequency corresponding to the rated motor rpm specified by the previous
parameter. It is included for the situation in which the motor rated frequency is not the same as the line rated
frequency (e.g. a 60 Hz motor on a 50 Hz supply). The rated frequency of the drive is still the rated line
frequency.
Motor Type [Motor type]
Linear number:
30
Minimum value:
0
Maximum value:
1
Default value:
0
This parameter specifies the type of motor connected to the drive.
0
induction (asynchronous)
1
synchronous
This parameter was added in Rev 5.00 and is not present in 4.xx.
Drive Type [Drive type]
Linear number:
32
Minimum value:
0
Maximum value:
1
Default value:
0
This parameter specifies the type of drive.
0
Bulletin 1557 (all versions)
1
Powerflex 7000
This parameter was added in Rev 5.30 and is not present in 4.xx.
Link Inductance [Link inductance]
Linear number:
27
Minimum value:
1.0 mH
Maximum value:
600.0 mH
Default value:
64.0 mH
This parameter specifies the nameplate value of the dc link inductor in mH (total for both coils).
Service Factor [Service Factor]
Linear number:
31
Minimum value:
0.75
Maximum value:
1.25
Default value:
1.0
This parameter specifies the service factor of the motor. Because the motor parameters are normalized to the
service factor, changing this parameter allows the motor rating to be changed without affecting the drive tuning.
This parameter was added in Rev 4.55/5.00.