Function library
Function blocks
3.5.51 Process controller (PCTRL1)
3−239
l
EDSVS9332P−EXT DE 2.0
3.5.51.2 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
t
ir
t
if
T
ir
T
if
t
RFG−OUT
[%]
w1
w2
T
ir
+ t
ir
100%
w2 * w1
T
if
+ t
if
100%
w2 * w1
Fig. 3−187 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.
3.5.51.3 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 %.
3.5.51.4 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).
3.5.51.5 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.
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