Parameter and variable descriptions 6-31 – Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE User Manual
Page 87
PARAMETER AND VARIABLE DESCRIPTIONS
6-31
1557-UM050F-EN-P – June 2013
Autotune Idc Bandwidth [Autotune Idc BW]
Linear number:
126
Minimum value:
10 r/s
Maximum value:
100 r/s
Default value:
50 r/s
This parameter specifies the bandwidth of the current regulator during autotuning of the dc link time constant. A
lower bandwidth is used during autotuning than during normal operation because a slower response can be
measured more accurately
.
Autotune Speed Command [Autotune spd cmd]
Linear number:
94
Minimum value:
20.0 Hz
Maximum value:
50.0 Hz
Default value:
30.0 Hz
This parameter specifies the speed command used during autotuning of the flux regulator and total inertia.
Prior to Rev 4.72/5.20, this parameter was called Autotune Speed Command Minimum and was defined
differently.
Autotune Torque Step [Autotune trq stp]
Linear number:
96
Minimum value:
0.050
Maximum value:
0.500
Default value:
0.100
This parameter specifies the size of the torque step that is added to the torque command during autotuning of the
total inertia. A value of 1.000 corresponds to rated torque.
Prior to Rev 4.60/5.00, this parameter was scaled in per unit based on the motor rated kVA and was about 10%
lower.
Autotune Isd Step [Autotune Isd step]
Linear number:
107
Minimum value:
0.001 pu
Maximum value:
0.020 pu
Default value:
0.010 pu
This parameter specifies the size of the step that is added to the magnetizing current command during autotuning
of the flux regulator for synchronous machines. It is not used for induction motors.
This parameter was added in Rev 5.00 and is not present in 4.xx.
Autotune Commutation Inductance [Autotune Lc
]
Linear number:
127
Minimum value:
0.00 pu
Maximum value:
0.50 pu
Default value:
0.00 pu
This parameter specifies the value of commutation inductance determined during autotuning. If the commutation
inductance autotuning is successful, then parameter "L commutation" in "P Current Control" is set equal to the
value of this parameter. If the commutation inductance autotuning fails, then parameter "L commutation" is not
changed.