Vacon 500X, User Manual

Page: 78 / 124

Tel. +358 (0)201 2121 • Fax +358 (0)201 212205
77
z
vacon vacon 500x parameters
7
516 Slip Comp Enable Default: No
Range: n/a
Level 1,2
This parameter is accessible through Macro modes, or through parameter 501 (V/Hz Select) and choosing
Vector mode. It is only visible if the drive is in a vector-capable mode; otherwise, it is hidden. 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
This parameter determines whether or not Phase Loss faults will occur.
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 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.
520 Filter FStator Default: 8 ms
Range: 1 - 100 ms
Level 2 (SVC)
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. This parameter is only visible if the drive is in a vector-capable mode.
521 Start Field En Default: No
Range: n/a
Level 2 (SVC)
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.
This parameter is only visible if the drive is in a vector-capable mode; otherwise, it is hidden.
522 Filter Time Slip Default: 100 ms
Range: 10 - 1000 ms
Level 2 (SVC)
This parameter filters the slip frequency applied to the motor, which can help improve the dynamic
response of the drive. It is only visible if the drive is in a vector-capable mode; otherwise, it is hidden. 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.