TDE MACNO MINIOPD EXP User Manual page 25

In the standard application, by default (P236=1), the speed reference value passes across a ramp
circuit that graduates its variations before it is used. Parameters P21, P22, P23 and P24 can be used
to establish independent acceleration and deceleration slopes in both directions of movement,
establishing the time required to pass from 0 to 100% in seconds. In particular (see diagram):
P21 sets the time the reference value requires to accelerate from 0 to +100%
P22 sets the time the reference value requires to decelerate from 100% to 0%
P23 sets the time the reference value requires to accelerate from 0% to -100%
P24 sets the time the reference value requires to decelerate from -100% to 0%
Setting sensitivity is 10 msec and the time must be between 0.01 and 199.99 seconds.
The default values are the same for all the parameters and are equal to 10 sec.
In the standard application, ramps can be enabled via a configurable logic input (I22) which works
parallel to connection P236: I22=H is the same as setting P236=1. This input ensures maximum
flexibility in ramp use in that the ramps are enabled only when required.
In the other application please refer to the specific documentation in order to enable the ramps
The ramp may also be rounded in the starting and finishing phases by setting C27=1 via the rounding
time set in seconds in P25 with resolution 0.1 sec and a range from 1 to 199.9 sec. (default 10 sec).
100%
0
P21
-100%
Rounding can be enabled on its own with C27=1, which will filter the overall speed reference value
only.
Some special applications may enable the linear ramps differently. See the respective instruction file
for further information.
2.2.1.1 FREQUENCY JUMPS TO AVOID RESONANCES
Using the parameters P179, P180, P181 and P182 it is possible to exclude, as working frequencies, all
those frequencies falling within the two bands defined between P179 - P77 and P78 – P182, where
P179, P77, P78 and P182 are expressed as % of the maximum working frequency (see diagram)
Wherever exclusion bands are pre-set the drive behaves in the following way:
If the set frequency reference falls within the exclusion band it is maintained at the lower value of the
band, if the set value is less than the mid band value, while if the value is greater than the mid band
value it assumes the upper value.
User's manual
P23
P22
2xP25
P24
25