integrating

ControlLogix Up/Dn Accumulator (UPDN)

Introduction to ControlLogix Up/Dn Accumulator (UPDN) The ControlLogix Up/Dn Accumulator (UPDN) instruction might seem a little confusing at first. It’s operation is very simple though. For example, we have two flow rates of a tank. The first rate is flow in. Likewise, the second rate is flow out. We can Read More »

UPDN Instruction

Tuning a PID for Tank Level

Introduction to Tuning a PID for Tank Level Tuning a PID for Tank Level has some challenges that are different than a standard PID tuning procedure. In the first place, a tank level is not self regulating. It’s an integrating process. In other words, if the system is slightly out Read More »

Tank Level