User manual

parameter descriptions vacon • 103
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9
When Standstill identification is selected, the drive will perform an ID-run
when it is started from selected control place. Drive has to be started within
20 seconds, otherwise identification is aborted.
The drive does not rotate the motor during Standstill identification. When ID
run is ready the drive is stopped. Drive will start normally, when the next start
command is given.
After end the identification, the drive need stop the start command. If control
place is Keypad, user need press stop button. If control place is IO,user need
put DI(Control signal) inactivate. If control place is fieldbus, user need set the
control bit to 0.
The ID run improves the torque calculations and the automatic torque boost
function. It will also result in a better slip compensation in speed control
(more accurate RPM).
The parameters below will change after ID run successfully,
a. P1.8 Motor control mode
b. P1.9 U / f ratio
c. P1.12 U / f mid point frequency
d. P1.13 U / f mid point voltage
e. P1.14 Zero freq voltage
f. P1.19 Motor identification (1->0)
g. P1.20 Rs voltage drop
Note!The nameplate data of the motor has to be set BEFORE doing ID run.
1.21 OVERVOLTAGE CONTROLLER
0 = Disabled
1 = Enabled, Standard mode (Minor adjustments of OP frequency are
made)
2 = Enabled, Shock load mode (Controller adjusts OP freq. up to
max.freq.)
1.22 UNDERVOLTAGE CONTROLLER
0 = Disable
1 = Enable
These parameters allow the under-/overvoltage controllers to be switched
out of operation. This may be useful, for example, if the mains supply voltage
varies more than –15% to +10% and the application will not tolerate this over-
/undervoltage. In this case, the regulator controls the output frequency taking
the supply fluctuations into account.
When a value other than 0 is selected also the Closed Loop overvoltage con-
troller becomes active (in Multi-Purpose Control application).
Note: Over-/undervoltage trips may occur when controllers are switched out
of operation.