Commissioning
Instruction manual 91/104 V9.2
NOTE:
random change in these parameters can lead to a worsening of the drive’s performance. It is advisable not to change these
values unless strictly necessary and possibly to contact the ALTER technical office for explanations and clarifications. Please note
that it is possible to return the parameters to the value prior to the change simply by removing the voltage from the services and
then returning it or using the ”Restore“ menu (see page 40), always allowed to NOT have already saved the parameters with the
”Memo Parameters“ menu (see page 40).
Proport. Gain
Minimum Maximum Units of measure
0
99.00
-
This parameter modifies the Proportional time constant of the flow loop (see drawing 22). It may be necessary to change this
parameter when the motor runs at speeds higher than its nominal plate speed and then it is weakened field. To enter the right
parameter it is essential to use the PC connected to the serial port of the drive and use the software to display the signals of the flow
loop while the motor is working and decide what to do.
It is recommended to change this parameter in small steps and test the motor reaction before further changes. When you have found
the right parameter that meets your needs, you can memorise the variations with the "Memo Parameters“ menu (see page 40) and not
before; in this way it will always be possible to return to the previous situation.
Integr. Gain
Minimum Maximum Units of measure
0
99.00
-
This parameter modifies the Integrative time constant of the flow loop (see drawing 22). It may be necessary to change this parameter
when the motor runs at speeds higher than its nominal plate speed and then it is weakened field. To enter the right parameter it is
essential to use the PC connected to the serial port of the drive and use the software to display the signals of the flow loop while the
motor is working and decide what to do.
It is recommended to change this parameter in small steps and test the motor reaction before further changes. When you have found
the right parameter that meets your needs, you can memorise the variations with the "Memo Parameters“ menu (see page 40) and not
before; in this way it will always be possible to return to the previous situation.
Drive setup
Set of parameters to adjust or activate some particular functions in the drive that are rarely used.
Emulated encoder
Set of parameters to adjust the type of emulated encoder to be generated on the X4 and X5 connectors. The emulated encoder is only
available if you use a transducer connected to the X14 connector.
ATTENTION:
in case of use with a resolver connected to the X14 connector you will get the number of PPRs set for each “elec -
tric revolution " of the resolver and consequently a zero pulse (Z channel). This means that using a multipolar resolver (2 or more
polar pairs) you will get a zero pulse for each revolution of the motor equal to the number of polar pairs of the resolver. The same
situation is valid for the obtained PPRs that will be multiplied by the number of resolver pole pairs.
Encoder resol.
Minimum Maximum Units of measure
8
8192
PPR
The selected number indicates the number of “pulse/revolution " (ppr) of an encoder equivalent to tracks A, B and Z.
56
Alter Elettronica s.r.l.
Drawing 22 Flux loop
Flux
Demand
Flux
Feedback
-
P
P gain
I
I gain
Anti
Windup
+
Limit
Is D
Demand
