Technical information

21Page
DD01T0213703
14.10.02
– SPEED DRIVER SETTING –
The speed driver is delivered by Sepro ready set with a set of “standard” parameters (see the list on page
24). However, a certain number of parameters must be adjusted for the axis to function correctly. When
replacing an ATV 16, use the values taken from the original speed driver.
Parameters to check or set :
– ACC : Acceleration time (ADJUSTMENT menu) : set to 0.2 sec if the speed driver is driven
by a 2–level set–point (low and high speed potentiometers).
– DEC : Deceleration time (ADJUSTMENT menu) : set to 0.4 sec if the speed driver is driven
by a 2–level set–point (low and high speed potentiometers).
– Ith : Thermal current (ADJUSTMENT menu) = motor nominal current + 10% . The motor
nominal current is taken from the motor’s identification plate.
– FrS : Nominal frequency that can be adjusted from 40 Hz to tFr (DRIVE menu). Value taken
from the motor’s identification plate.
– tFr : Speed driver maximum output frequency (DRIVE menu). Must be set to at least 40%
above the nominal frequency.
– NCR : Nominal current of motor (DRIVE menu) : taken from the motor’s identification plate.
– NSP : Nominal rotation speed of motor (DRIVE menu) : taken from the motor’s identification
plate.
– COS : Power factor (DRIVE menu) : taken from the motor’s identification plate.
– HSP : High speed frequency (ADJUSTMENT menu) : adjustable from LSP to tFr. Set this
frequency to 67 Hz or to the value taken from the original ATV 16.
– UFR : IR compensation =Boost (ADJUSTMENT menu) : adjustable from 0 to 150 %. It must
be increased whilst checking at all speed levels that the current measured in the motor (LCr in
the monitoring menu) is lower than the nominal current taken from the identification plate. If
this parameter is too high, you get jerky movements at slow speed.
– SLP : Slip compensation (ADJUSTMENT menu) : cancel if the axis blocks at slow speed.
– BRA : DEC ramp adaptation (DRIVE menu) : remove if the axis blocks at slow speed.
– ENT 3 : Overfluxing rate (ADVANCED DRIVE menu) : cancel if the axis blocks at slow speed.
– tUn : Auto tune (DRIVE menu). This parameter must be set to “yes” for the speed driver to
adapt its control to the motor. Once the auto tuning has been done, the “tUn” parameter
automatically goes to “done”, or “no” if there is an error.
Consult the “ATV 58 Description and Use” manual to see how to modify these parameters.