Lenze EVS93 Series, Системное руководство

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Function library
Function blocks
3.2.71 Process controller (PCTRL1)
3−236
l
EDSVS9332K−EXT EN 4.0
3.2.71.2 Ramp function generator
The setpoint PCTRL−SET is led via a ramp function 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. 3−188 Acceleration and deceleration times of the ramp function generator
l The ramps can be adjusted separately for acceleration and deceleration.
– Acceleration time t
ir
with C0332.
– Deceleration time t
if
with C0333.
l
PCTRL−INACT = HIGH
– The ramp function generator is immediately set to zero.
3.2.71.3 Value range of the output signal
l
The process controller operates in bipolar mode in the default setting.
– The output value is limited to
±
100 %.
l
The function can be set to unipolar mode under C0337.
– The output value is limited to 0 ... +100 %.
3.2.71.4 Evaluation of the output signal
l The output signal can be evaluated after the limitation block via PCTRL−INFLU.
– The process controller can be hidden or unhidden with this evaluation.
– The calcuation is done according to the following formula:
100 % (PCTRL−OUT) = 100 % * 100 % (PCTRL−INFLU).
3.2.71.5 Deactivation of the process controller
l
PCTRL−INACT = HIGH deactivates the process controller
– PCTRL−OUT is set to zero.
– The I−component is set to zero.
– The ramp function generator is set to zero.