SK 54xE – Users Manual for Frequency Inverters
114 BU 0505 EN-3021
2 =
Value from universal encoder,
"Value from universal encoder":
With this method the
starting position of the rotor is determined from the absolute position of a universal encoder
(Hiperface, EnDat with Sin/Cos track, BISS with Sin/Cos track or SSI with Sin/Cos track)
The universal encoder type is set in parameter (P6
04).
For this position information to be unique it must be known (or determined) how this rotor
position relates to the absolute position of the universal encoder. This is performed via the
offset parameter (P334). Motors should be delivered either with a
starting rotor position
"zero" or the starting rotor position must be marked on the motor.If this value is not
available, the offset value can also be determined with the settings "0" and"1" of parameter
(P330). For this the drive unit is started with the setting "0" or "1". After the first start the
offset value which has been determined is saved in parameter (P334).
However, this value is
volatile, i.e. it is only saved in the RAM. In order to save it in the EEPROM, it must be briefly
changed and then s
et back to the determined value.
After this, fine tuning can be carried out with the motor idling. For this, the drive is operated
in closed loop mode (P300=1) at as high a speed as possible below the field weakening
point. From the starting point, the off
set is gradually adjusted so that the value of the voltage
d
(P723) is as close to zero as possible. For this, a balance between the
positive and negative direction of rotation must be sought.
Usually the value "zero" will not be completely achieved, as at higher speeds the drive is
subjected to a slight load due to the motor fan. The universal encoder should be located on
the motor shaft.
Pos: 202 /Anleitungen/ Elektronik/F U und Starter/5. Parameter/ Parameterauflis tung (P000 ...)/P300- P399/Parameter P330 – Rege lverfahren PMSM _ Einstel lung 3 @ 6\mod_1417690505 900_388.docx @ 191992 @ @ 1
3 =
Value from CANopen encoder,
"Value from CANopen encoder":
As for "2", however a
CANopen absolute encoder is used to determine the starting position of
the rotor.
Pos: 203 /Anleitungen/ Elektronik/F U und Starter/5. Parameter/ Parameterauflis tung (P000 ...)/P300- P399/Parameter P330 – Rege lverfahren PMSM _ Einstel lung 4 - "reserviert" @ 6\mod _1417690717986_388.doc x @ 192023 @ @ 1
4 =
Pos: 204 /Anleitungen/ Elektronik/F U und Starter/5. Parameter/ Parameterauflis tung (P000 ...)/P300- P399/Parameter P330 – Rege lverfahren PMSM _ Einstel lung 5 - "reserviert" @ 6\mod _1417690822124_388.doc x @ 192054 @ @ 1
5 =
Pos: 205 /Anleitungen/ Elektronik/F U und Starter/5. Parameter/ Parameterauflis tung (P000 ...)/P300- P399Parameter P330 – Regel verfahren PMSM _ Hinweis, I G mit 0-Spur [SK 54xE] @ 6\mod_1417690875847_ 388.docx @ 192085 @ @ 1
NOTE:
If there is an incremental encoder wi
th a "null track" on the motor shaft, the "null track" can
also be used to determine the position of the stator. The zero impulse is then used for
synchronisation of the rotor position.
The offset between the zero pulse and the actual "zero" rotor position is set in parameter
(P334) "Encoder offset".
If the Sense cable (+5V Sense and 0V Sense) is not connected,
there is no synchronisation to the zero pulse. Parameter (P330) must be set to "0" or "1".
The value which needs to be set for parameter (P334) mus
t be determined experimentally or
must be enclosed with the motor.
Pos: 206 /Anleitungen/ Elektronik/F U und Starter/5. Parameter/ Parameterauflis tung (P000 ...)/P300- P399/Parameter P331 – Umsc haltfrequenz PMSM @ 0\mod_ 1327677873447_388.doc x @ 8934 @ @ 1
P331
Switch over freq. PMSM
(Switch over frequency PMSM)
S P
5.0 ... 100.0 %
{ 15.0 }
Definition of the frequency up to which in operation without encoder the control method of a
PMSM (Permanent Magnet Synchronous
Motor) is activated according to (P330). In this case,
100 % corresponds to the nominal motor frequency from (P201).
Pos: 207 /Anleitungen/ Elektronik/F U und Starter/5. Parameter/ Parameterauflis tung (P000 ...)/P300- P399/Parameter P332 – Hys terese Umschaltfrequenz PMSM @ 0\mod_13 27677923148_388.d ocx @ 8957 @ @ 1
P332
Hyst. Switchover PMSM
(Switchover frequency hysteresis PMSM)
S P
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).
Pos: 208 /Anleitungen/ Elektronik/F U und Starter/5. Parameter/ Parameterauflis tung (P000 ...)/P300- P399/Parameter P333 – Flu ss-Rückkopplungsf aktor PMSM @ 0\mod_1327677 965944_388.docx @ 8980 @ @ 1
P333
Flux feedb. fact. PMSM
(Flux feedback factor PMSM)
S P
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: 209 /Anleitungen/ Elektronik/F U und Starter/5. Parameter/ Parameterauflis tung (P000 ...)/P300- P399/Parameter P334 – Geber offset PMSM @ 0\mod_132767 8017910_388.docx @ 9003 @ @ 1
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