Santerno DCREG2 Series User Manual page 94

15P0059B3
USER MANUAL
2. Speed autotuning. This tuning can be performed for whichever choice of current loop operation and is
generally recommended. It can be avoided in case of a DCREG2, of a DCREG4 in armature feedback or
when the inertia torque of the load is variable (i.e. a coiler).
The command is issued by setting parameter P001 to 2:Speed through the "DEC" or "INC" keys and by
pressing the "SAVE" key. When the following message Close ENABLE to continue is displayed, close the
ENABLE contact at term. 24 by closing (if not already done) the KM remote switch that supplies the power
section. When the Press SAVE to continue message is displayed, press the "SAVE" key again. The
autotuning procedure is over when message AutoTune in progress... disappears and P001=0 is displayed
again.
The values of the parameters P070 and P071, or, alternatively, of parameters P076 and P077 are
calculated and saved on EEPROM. Parameters P076 and P077 are calculated instead of the parameters
P070 and P071if the possible digital input, that has been configured by setting one of the parameters
C130...C135 to the value 8:SecondParmSet, is closed.
N.B. The speed self-tuning, during which the motor has to physically turn, delivers a positive polarity to the
bar A as compared to bar A2.
NOTE
3. Autotuning for resistive drop RxI. This autotuning procedure complies with any current loop
operation mode and with any speed feedback.
This procedure, which should always be done, allows to compute the value of par. P088 and saves it on
EEPROM memory. Par. P088 is used to compute the back-electromotive force and displays it in par.
M007 (BEMF). Par. P088 value is also used for the armature resistive drop compensation, both for the
field current dynamic regulation in field weakening mode and for the armature feedback (in that case, this
is possible through par. P086, where one of its values per cent is programmed).
This command is entered by setting parameter P001 to 3:RxI by using the "DEC" or "INC" keys and by
pressing the "SAVE" key. When the following message is displayed (Close ENABLE to continue), close
the ENABLE contact at terminal 24 by closing KM power section contactor. When the Press SAVE to
continue message is displayed, press the "SAVE" key again. The autotuning procedure is over when
message AutoTune in progress... disappears and par. P001 = 0 is displayed again.
During the autotuning procedure, the optimisation of the parameter value relating to the armature
feedback reading occurs, so that M006 (Varm) displays 0V when the drive is not running.
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Whenever two different sets of speed loop adjusting parameters have been
considered through one of the MDIx configurable digital inputs being set at
value 8:Second ParmSet, then the speed automatic tuning calculates the
parameters relating to one of the two sets according to the state of the above
mentioned digital input.
DCREG2
DCREG4