User manual
12-6
DSC/DSCT Series
The drive thus starts if
o9
=H,
c21
=1 and digital input
i2
(on line) is active; If the on-line command becomes
inactive the power will be instantaneously interrupted (
c27
=0) or will be interrupted only when the motor has
been slowed down to a minimum speed by the controller (
c27
=1 ).
This minimum speed can be with parameter
P41
(if |V| <
P41
⇒
o11
=L ).
O11
IN RUN
RUN
C21
READY DRIVE
C27
MIN VELOCITY'
RUN DRIVE O12=H
O12
+
I2
O9
The direction of rotation becomes active, or
o13
=H, if the rotation is clockwise and thus V>0.
> 0
SENSe OF ROTATION CW O13=H
O13
CW
ROTATION
V
VELOCITY' (D4)
For further analysis of sequential logics see paragraphs 10.2 and 10.3.
12.
REPLACING AN SC DRIVE WITH A DSC (SCT WITH A DSCT)
The connectors of the DSC drives are the same as those of the SC series apart from connector J1 which has
two more terminals, J1-11 and J1-12; all the other terminals ( J1 1-10) coincide, so that the only precaution
which needs to be taken is to insert the cable connector so that it occupies only the first 10 terminals.
The connector of the analogue signals J2 has the same number of terminals, but when in the SC analogue
series terminal J2 -3 is a 0V, in the DSC digital series the analogue output is programmable. Because of this
difference any connection of an earth wire or zero wire to terminal J2-3 (existing in the SC series) is removed
and cabled to terminal J2-1 or J2-2.
In the DSC series the sign of the TG OUT output is inverted with respect to the SC series.
Respecting the warnings given above, the DSC drive is replaced with the SC drive by connecting the fixed
terminals in the same way and using the same extractable connectors. For correct working, the digital inputs
and outputs (
c1
-
c8
) must be programmed with the default values and
c9
=1 and
c10
=1 must be
programmed.
The other parameters and the other connections are then adjusted depending on the application, taking
account of the motor poles (
P53
), the resolver poles (
P54
), the resolver displacement (
P55
), the maximum
motor revs (
P52
), the ramp ON or OFF(
c26
), and finally adapting the gains for the dynamic response acting
on
P23
.
