81
Basic setting of the process controller
Type 8792, 8793 REV.2
Q.LIN #10
CMD=100%
Display of the node which is currently running (progress is indicated by a progress bar along the upper edge
of the display).
Q.LIN
ready
Automatic linearization was successfully completed.
→
Select
EXIT
. Return to the main menu (MAIN).
You have set the parameter.
Possible error messages when running
P.Q‘LIN:
Display
Cause of error
Remedy
Q.LIN
err/break
Manual termination of linearization by
pressing the
EXIT
key.
P.Q‘LIN
ERROR 1
No supply pressure connected.
Connect supply pressure.
No change to process variable.
Check process and, if required, switch
on pump or open the shut-off valve.
Check process sensor.
P.Q‘LIN
ERROR 2
Failure of the supply pressure while
P.Q’LIN
running.
Check supply pressure.
Automatic adjustment of the
X.TUNE
position controller not run.
Run
X.TUNE
.
Table 32:
P.Q‘LIN; possible error messages
15.5
P.TUNE
– Self-optimization of the process controller
This function can be used to automatically parameterize the PID controller integrated in the process
controller.
In doing so, the parameters for the P, I and D portion of the PID controller are automatically determined and
transferred to the corresponding menus of (
KP
,
TN
,
TV
). This is where they can be viewed and changed.
Explanation of the PID controller:
The control system of Type 8793 has an integrated PID process controller. Any process variable, such as flow
rate, temperature, pressure, etc., can be controlled by connecting an appropriate sensor.
To obtain good control behavior, the structure and parameterization of the PID controller must be adjusted to
the properties of the process (controlled system).
This task requires control experience as well as measuring instruments and is time-consuming. The
P.TUNE
function can be used to automatically parameterize the PID controller integrated in the process controller.
Basic information for setting the process controller can be found in chapters “40. Properties of
PID controllers” and “41. Adjustment rules for PID controllers”.
english
Summary of Contents for 8792
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