BONFIGLIOLI ACTIVE Cube ACU 201-01, Operating Instructions Manual

Page: 145 / 292

The minimum number of revolutions needed until the required position is reached
depends on the
Actual frequency
241 and
Deceleration
(
clockwise
) 421 (or
Decel-
eration anticlockwise
423) as well as the
No. of pole pairs
373 of the motor.
p a 2
2
f
min
U
⋅ ⋅
=
U
min
= min. number of rotations
f =
Actual frequency
241
a =
Deceleration
421 (423)
p =
No. of pole pairs
373 of motor
Example: f = 20 Hz, a = 5 Hz/s, p = 2
⇒
rpm = 20
With an actual frequency of 20 Hz and a delay of 5 Hz/s, at least 20 rotations are
needed until standstill at the required position. This is the minimum value for the
Positioning distance
460; a shorter positioning distance is not possible. If the num-
ber of rotations until the required position is reached is to be lower, the frequency
must be reduced, the deceleration increased, or the reference point must be shifted.
The digital signal for registration of the reference point and the logical assignment
are to be chosen from a selection of S
ignal source
459. The link of the digital inputs
S2IND, S3IND and S6IND to further functions is to be checked according to selected
Configuration
30 (e.g., in configurations 110 and 210, digital input S2IND is linked
to the function "Start of clockwise operation").
The signals for positioning and a stopping behavior should not be assigned to the
same digital input.
Signal source
459 Function
2 - S2IND, neg. edge
The positioning starts with the change of the
logic signal from 1 (HIGH) to 0 (LOW) at the
reference point.
3 - S3IND, neg. edge
6 - S6IND, neg. edge
1x - SxIND, pos. edge
The positioning starts with the change of the
logic signal from 0 (LOW) to 1 (HIGH)
2x - SxIND, pos./neg. edge
The positioning begins with the change of the
logic signal
The registration of the reference position via a digital signal can be influenced by a
variable dead time while the control command is read and processed. The signal
running time is compensated by a positive figure for the
Signal correction
461. The
setting of a negative signal correction decelerates the processing of the digital signal.
Parameter Settings
No. Description Min. Max. Fact. sett.
461 Signal correction -327.68 ms +327.67 ms 0.00 ms
The influences on the positioning which depend on the operating point can be cor-
rected empirically via the
Load correction
462 parameter. If the required position is
not reached, the deceleration duration is increased by a positive load correction val-
ue. The distance between the reference point and the required position is extended.
Negative values accelerate the braking process and reduce the positioning distance.
The limit of the negative signal correction results from the application and the
Posi-
tioning distance
460.
Parameter Settings
No. Description Min. Max. Fact. sett.
462 Load correction -32768 +32767 0
06/13 Operating Instructions ACU 145