control design and simulation loop final value not what I expected

[bunnykins]

Hi LabVIEW forum members,

I have a Control and Simulation frame in which I'm simulating a closed loop controller (see attached file).  When I apply a unit step input I was expecting to get the response to settle out at unity i.e. the input step being the setpoint.  However it settles at approx 0.625.

Can anyone point me in the right direction please ?  I'm obviously doing something wrong here.

Regards,

[bunnykins · Accepted solution]

Ok guys,

Cancel my last post, I found my error, it was in the P+I controller form, I made an error in the Integral control action transfer function hence the integrator did'nt get to integrate out the error.

Regards,