Vacon 50X, User Manual

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vacon 50x parameters vacon 74
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7
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.
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.
This parameter activates the drive’s ability to measure the stator resistance of the at-
tached 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 46 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.
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) val-
ue (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 val-
ues 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 frequen-
cies over the Knee Frequency and protect the drive against overcurrents – often the case
when using special motors or spindle drives
.
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 pro-
duce nuisance trips when starting.
516 Slip Comp Enable Default: No
Range: Text string
Levels 1, 2
517 Single Phase Default: Model dependent
Range: Text string
Level 2
519 Find Mtr Data Default: Not active
Range: Text string
Macro
520 Filter FStator Default: 8 ms
Range: 1–100 ms
Level 2
521 Start Field En Default: No
Range: Text string
Level 2