Samson Trovis 6400 Mounting And Operating Instructions page 69

Start-up procedure
Proportional-plus-integral-plug-derivative (PID) controller
– Specify K = 0.1 ; T
P
– Enter the value of the desired set point (reference variable) in the OPERATING level.
– Then modify the output variable by pressing the (G) key until the control valve slowly opens
and the error X
d
– Switch over to AUTOMATIC mode by pressing the MANUAL/AUTOMATIC key.
– Increase the K
P
– Increase the Tv value until oscillation cannot be determined any more.
– Increase the K
P
– Increase the Tv value again until oscillation cannot be determined any more.
– Repeat this procedure several times until oscillation cannot be suppressed any longer.
– Slightly reduce the K
– Reduce the T value until the control loop tends to hunt again, and then slightly increase
N
value again until oscillation cannot be determined any more.
Optimization (tuning the process control station to the controlled system)
= 1999 and Tv = 1 in the PARAMETER level.
N
is eliminated.
value in the PARAMETER level until the controlled system tends to hunt.
value until oscillation reoccurs.
value and the Tv value so that the system can recover.
P
69