Siemens PCS 7 3.2 PID Tuner

Stabilization of Unstable Control Loops

14 MPC Level

V 1.0, Beitrags-ID: 42200753

3.2 PID Tuner

The PCS 7 PID tuner can be used for integral processes without problems if at

least one stable controller parameterization is already available. The following hints

are helpful for this:

 Fix the check mark „With integral action in the process“

 Excite the process with a step in the set point in closed loop in automatic mode

 Chose the proportional only controller as controller type, at least, if you want to

use this controller as slave controller in cascades (e.g. subordinated to a MPC)

or if you are not interested in exact set point tracking.

 Set the MC_Offset to the value of the manipulated variable needed to reach

the typical operating point, if you know it, in order to avoid the persistent control

error at least in this operating point.