Siemens PCS 7 Manual De Usuario

Stabilization of Unstable Control Loops 
 

 

14 

MPC Level 

V 1.0, Beitrags-ID: 42200753 

 

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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.