User manual
10-2
DSC/DSCT Series
The SPEED RANGE logic signal is a signal which is active when the speed is between the two percentage
values set at parameters
P44
and
P43
if connection
c33
is set to 1, while if the connection is set to 0 the
output becomes active when the real speed is around the reference signal within the band set in the two
parameters, i.e.:
P43
∗
P52
≤
Vrif -Vreal
≤
P44
∗
P52
c33
=0
If you desire the output become active when the motor runs anti-clockwise at a speed between 1200 and
1300 r.p.m. set:
c33
=1
P44
=(-1200)/P52
∗
100=-60.0%
P52 = 2000
P43
=(-1300)/P52
∗
100=-65.0%
If you desire the output become active whenever the motor speed is equal to the requested speed
±
20 r.p.m.
the following is set:
c33
=0
P43
=(-20)/P52
∗
100=-1%
P52 = 2000
P44
=+20/P52
∗
100=1%
SPEED RELAY O16=H
+
-
∆
V
O16
P43=BOTTOM
LIMIT
P44=TOP
LIMIT
V
C33
V
rif
SPEED
REFERENCE (d3)
> P43
< P44
RANGE
SPEED IN
SPEED (d4)
10.4.
SETTING OF THE PEAK CURRENT LIMIT VALUES AND CURRENT RANGE
Parameters
P35
and
P36
set the maximum allowed value for the effective peak current that can be delivered
by the drive, they are expressed in percentage of the maximum value allowed by the size, e.g.:
If drive Imax is 40A and In motor = 11A and you want to limit the maximum current which can be
delivered to a value not greater than 33A (three times In motor), set:
P35
=
P36
= 33 / 40
∗
100 = 82.5%
In the same way those calculations are performed if you want to use the current range logic function. This
function is active (level H) when the current is between the two values set in
P45
and
P46
, while it is not
active (level L) when the current leaves these values. E.g. with the drive and the aforesaid motor, if one
wants a logic signal that signals that the current demanded for the motor is greater than the rated one, in the
two torque directions, set:
P45
= -11/40
∗
100 = -27.5%
P46
= 11/40
∗
100 = 27.5%
c08
= 08, and so output
oL2
will be active (24V) for current values within
±
11A, while for current values
higher than 11A in absolute value, it will be set to zero.
CURRENT RELAY O17=H
017
CURRENT
RANGE
IN
rif
I
> P45
< P46
P46 = TOP
LEVEL
P45 = BOTTOM
LEVEL
CURRENT
REQUEST (D11)
