Lenze EVS93 Series, System Manual

Page: 251 / 386

Function library
Function blocks
3.2.68 Speed setpoint conditioning (NSET)
3−223
l
EDSVS9332K−EXT EN 4.0
3.2.68.3 Setpoint inversion
The output signal of the JOG function is led to an inverter.
The sign of the setpoint is inverted if the input NSET−N−INV is triggered with HIGH signal.
Ramp function generator for the main setpoint
The setpoint is then led to a ramp function generator with linear characteristic. Setpoint
step−changes at the input are thus converted into a ramp.
100 %
0
tir tif
Tir Tif
t
RFG − OUT
[%]
w1
w2
T
ir
+
t
ir
100%
w2
*
w1
T
if
+
t
if
100%
w2
*
w1
Fig. 3−172 Acceleration and deceleration times of the ramp function generator
l
The ramps can be set separately for acceleration and deceleration.
– Different acceleration and deceleration times can be activated via the inputs NSET−TI*x 16
(for table and function see JOG setpoints; the decoding must be done according to the
signal graphic).
– The T
i
times can only be activated in pairs.
l
When the controller is inhibited (CINH), the ramp function generator accepts the value applied
to the input NSET−CINH−VAL and transmits it to the next function. This function has priority
over all other functions.
l
NSET−RFG−STOP = HIGH
– The ramp function generator is stopped. Changes at the input of the ramp function
generator have no effect on the output.
l
NSET−RFG−0 = HIGH
– The ramp function generator decelerates to zero along the deceleration ramp.
l It is also possible to load the ramp function generator online with a defined value. For this, the
input NSET−LOAD must be set to HIGH. As long as this input is set, the value at input
NSET−SET is accepted by the ramp function generator and passed to the output.