ProMinent DULCOMETER - Page 115

The function [Remote setpoint] makes it possible for you to change the setpoint within a
to be specified range for all measured variables of the controller channel 1 using an
external 0/4 ... 20 mA analog signal. The analog signal can originate as an active signal
from a PLC or also be specified using a 1 kOhm precision potentiometer.
Remote setpoint
Signal source
Function
A1477
3.3.1
Range
4mA =
20 mA
Assignment
4 ... 20 mA
1.00 ppm
1.00 ppm
Channel 1
mA output 1
On
Fig. 80: Remote setpoint via a 0/4 ... 20 mA analog signal
Description Factory setting Adjustment Options
Function Off On/Off
Signal source Fixed, mA input 2
Range 4…20 mA 0…20mA/4…20mA
4 mA Dependent on the meas‐
ured variable and meas‐
uring range
Dependent on the measured variable
and measuring range
20 mA Dependent on the meas‐
ured variable and meas‐
uring range
Dependent on the measured variable
and measuring range
Assignment Fixed, channel 1
Application example:
In a process control system, several dif‐
ferent pH setpoints must be reached in
steps and then maintained. The system is
controlled using a PLC. The PLC indicates
the required standard signals to the con‐
troller via an analog mA output. The con‐
troller automatically regulates based on
the setpoint. The controller can report the
current pH value to the PLC via an analog
mA output.
Setting the [Control]
115