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X4 AC Drive User’s Manual Chapter 7: X4 Parameters
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516 Slip Comp Enable Default: No
Range: n/a
Level 1,2
The following data values may be assigned to this parameter:
Parameter Value Description
No No Slip Compensation enabled
Yes Slip Compensation enabled
Parameter 516 permits activation of slip compensation for better speed regulation. The motor rated speed must be
entered into parameter 511 (Rated Mtr RPM) for best results.
517 Single Phase
Default: No
Range: n/a
Level 2
The following data values may be assigned to this parameter:
Parameter Value Description
No No single phase input operation. Phase loss engaged.
Yes Single phase operation. No phase loss.
519 Find Mtr Data Default: Not active
Range: n/a
Macro
This parameter activates the drive’s ability to measure the stator resistance of the attached motor. The automatic stator
resistance measurement can be performed either through the keypad or through the serial link. See “Measuring Stator
Resistance (RS Measurement)” on page 37 for more information about this parameter. The following data values may
be assigned:
Parameter Value Description
Not Active No stator RS measurement.
Motor RS Automatic RS measurement using macro procedure.
520 Filter FStator Default: 8 ms
Range: 1 - 100 ms
Level 2
This parameter filters the stator frequency applied to the motor, which can help tune the acceleration behavior of the
motor. This is particularly helpful when using short ramps and operating the motor at a frequency above the “V/Hz Knee
Freq” (parameter 503) value (field weakening area). Lower values allow dynamic currents to be produced, but with
greater peaks. This could produce unstable states in the field weakening area. Low values for this parameter can cause
overcurrent faults while accelerating to frequencies over the Knee Frequency. Higher values allow the drive to run more
smoothly at frequencies over the Knee Frequency and protect the drive against overcurrents--often the case when using
special motors or spindle drives.
521 Start Field En Default: No
Range: n/a
Level 2
Parameter Value Description
No The shaft will begin rotating after receiving a Start command, without delay. If the application has
heavy load conditions or short ramp times, this setting can produce very large starting currents, to
overcome the inertia of the system. This may produce nuisance trips when starting.
Yes The shaft will begin rotating after receiving a Start command, with delay. During this delay, the drive
is building up the magnetic field in the motor. This allows the drive to start in vector mode with less
starting current.
522 Filter Time Slip
Default: 100 ms
Range: 10 - 1000 ms
Level 2
This parameter filters the slip frequency applied to the motor, which can help improve the dynamic response of the drive.
This parameter produces the following results based on the parameter value:
If the parameter is configured to 100 ms, the drive will produce stable conditions to a change in load, in most cases.
If the parameter is configured to less than 100 ms, the drive will be able to react quickly to a change in load, but may
over-compensate its reaction to the load.
If the parameter is configured to greater than 100 ms, the drive will react very slowly to a change in load and will need
a longer time to compensate for the difference between the setpoint and the actual frequency.
Table 7-2: Description of X4 Parameters (Page 12 of 26)