Lenze EVS 9300 series, System Manual

Page: 303 / 504

Function library
Function blocks
9.2.49 Process controller (PCTRL1)
9-177
L
EDSVS9332S-D11 EN 3.0
9.2.49.2 Ramp function generator
The setpoint PCTRL-SET is led by a ramp generator with linear characteristic. Thus, setpoint
step-changes at the input can be transformed 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. 9-130 Acceleration and deceleration times of the ramp generator
z The ramps can be adjusted separately for acceleration and deceleration.
– Acceleration time t
ir
with C0332.
– Deceleration time t
if
with C0333.
z PCTRL-INACT = HIGH
– The ramp generator is immediately set to zero.
9.2.49.3 Value range of the output signal
z
The process controller operates in bipolar mode in the default setting.
– The output value is limited to
±
100 % .
z The function can be set in unipolar mode under C0337.
– The output value is limited to 0 ... +100 % .
9.2.49.4 Evaluation of the output signal
z The output signal can be evaluated after the limitation block via PCTRL-INFLU.
– The process controller can be used or suppressed with this evaluation.
– The calcuation is done according to the following formula:
100 % (PCTRL-OUT) = 100 % * 100 % (PCTRL-INFLU).
9.2.49.5 Deactivation of the process controller
z PCTRL-INACT = HIGH deactivates the process controller
– PCTRL-OUT is set to zero.
– The I-component is set to zero.
– The ramp generator is set to zero.