Does Tuning a PID Controller Require a Bump Test?

By Control Guru | August 18, 2014

It’s generally accepted that tuning a PID controller requires some form of testing. Whether a step, bump, doublet, or pseudo random binary sequence, the test forces a change to the Controller Output (CO) which drives a response in the Process Variable (PV). The dynamic relationship between the CO and PV provides the basis for modeling a process’ behavior. In turn, the model is converted into tuning parameters corresponding with your controller. All of this is made possible by conducting a simple test. But what if it’s not that simple.

What Tuning Software is Available for Use With Rockwell Automation Controllers?

By Control Guru | August 8, 2014

If you’re tired of manual tuning and you want more than the auto-tune function can muster, then you’re in luck. There are a variety of software products that support the array of PLCs and PACs from Rockwell Automation. No surprise that the only solution recommended by Rockwell Automation comes from your friends at Control Station.

What is Model-Predictive Control?

By Control Guru | July 23, 2014

Model-Predictive Control (MPC) is advanced technology that optimizes the control and performance of business-critical production processes. So is Control Loop Performance Monitoring (CLPM) software. But if both help practitioners to optimize control loop performance, then what’s the difference?

What Is Cascade Control? How Is Cascade Control Configured?

By Control Guru | July 17, 2014

As they say: Timing is everything.  The lag between upset and response directly impacts a system’s performance along with the performance of other processes with which it interacts.  Fortunately, there are a variety of approaches available that leverage the PID’s capabilities.  These approaches improve a system’s ability to reject the negative impact of disturbances.  Cascade Control is among them.