01/02 AWB8230-1415GB
PID controller
139
Internal regulator-based calculations
All calculations within the PID algorithm are carried out in percen-
tages, so that different physical units can be used, such as
• Pressure (N/m
2
),
• Flow rate (m
3
/min),
• Temperature (°C), etc.
The setpoint and returned actual values can, for example, also be
compared as percentages.
A useful scaling function is also available (PNU A075). When these
parameters are used, you can define the setpoint directly as the
required physical quantity and/or display setpoint and actual
values as physical quantities suitable for the process.
In addition, an analog signal matching is available (PNU A011 to
A014), with which you can define a range based on the actual
value feedback signal. The following graphs illustrate the mode of
operation of this function.
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