Configuration of analog and digital setpoints and actual values
Analog setpoints via terminal
10
Function library
10.8
10.8.2
L
10.8-8
EDS82EV903-1.0-11/2002
Example for pressure control
If, for instance, the control range of a pressure control is to be limited to a value
lower than the rated sensor value P
r
, the effective pressure setpoint can be
proportionally reduced through the gain of the analog input (C0027, C0414):
l Actual pressure value via pressure sensor (P
r
= 0 - 200 mbar) at X3/2U
(C0412/5 = 4).
l Analog pressure setpoint via X3/1U (C0412/4 = 1).
l The maximum pressure is to be limited to 120 mbar. Reduce the effective
pressure setpoint via the gain of the analog input:
C0414∕1 =
P
1
P
N
â‹… 100 % =
120 mbar
200 mbar
â‹… 100 % = 60 %
Example:Calibration when using
a process controller
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