Nord Drivesystems NORDAC LINK SK250E-FDS, User Manual

Page: 107 / 212

5 Parameter
BU 0250 en-3021 107
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P331
Switch over freq. CFC ol
(Switch over frequency
CFC open-
loop
)
S P
(Former designation: " Switch over freq. PMSM ")
5.0 ... 100.0 %
{ 15.0 }
Definition of the frequency from which, in operation without encoder, the control method of a
PMSM (Permanent Magnet Synchronous Motor) is activated according to (P300). In this case,
100 % corresponds to the nominal motor frequency from (P201).
The parameter is only relevant for the control method "CFC open-loop" (P300, setting "2").
Pos: 340 /Anleitungen/Elektronik/FU und Starter/5. Parameter/Parameterauflistung (P000 ...)/P300-P399/Parameter P332 – Hysterese Umschaltfrequenz CFC ol @ 21\mod_1524211317202_388.docx @ 2417560 @ @ 1
P332
Hyst. Switchover CFC ol
(Switchover frequency hysteresis
CFC open-
loop
)
S P
(Former designation: " Hyst. Switchover PMSM ")
0.1 ... 25.0 %
{ 5.0 }
Difference between the switch-on and switch-off point in order to prevent oscillation on the
transition of operation without encoder into the control method specified in (P330) (and vice
versa).
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P333
Flux feedback CFC ol
(Flux feedback
CFC open-
loop
)
S P
(Former designation: " Flux feedb. fact. PMSM ")
5 ... 400 %
{ 25 }
This parameter is necessary for the position monitor in CFC open-loop mode. The higher the
value which is selected, the lower the slip error from the rotor position monitor. However, higher
values also limit the lower limit frequency of the position monitor. The larger the feedback
amplification which is selected, the higher the limit frequency and the higher the values which
must be set in (P331) and (P332). This conflict of objectives can therefore not be resolved
simultaneously for both optimisation objectives.
The default value is selected so that it typically does not need to be adjusted for NORD IE4
motors.
Pos: 342 /Anleitungen/Elektronik/FU und Starter/5. Parameter/Parameterauflistung (P000 ...)/P300-P399/Parameter P334 – Geberoffset PMSM @ 0\mod_1327678017910_388.docx @ 9003 @ @ 1
P334
Encoder offset PMSM
(Encoder offset PMSM)
S
-0,500 ... 0,500 rev
{ 0,000 }
Evaluation of the zero track is necessary for the operation of PMSM (Permanent Magnet
Synchronous Motors). The zero impulse is then used for synchronisation of the rotor position.
Parameter (P330) must be set to "0" or "1".
The value to be set for parameter (P334) (offset between zero pulse and actual rotor position
"Zero") must be determined experimentally or included with the motor.
A sticker is typically affixed to motors supplied by NORD on which the setting is specified.
Provided that the details on the motor are specified in ° , these must be converted into rev (e.g.
90 ° = 0.250 rev).
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Note
– The zero track is connected via digital input 1 .
– Parameter P420 [-01] must be set to function 43 "0-track HTL encoder DI1" in order to
evaluate the pulses of the zero track.
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