How to fix PIDE Stuck High or Low in ControlLogix Using Function Blocks in ControlLogix, you can get the PIDE Stuck High or Low. This can occur when you are tuning a loop. To begin with, you only have proportional gain when tuning the loop. Your Process Variable could be Read More »
Introduction to Common PID Setup Mistakes In this section, I’ll discuss some common Common PID Setup Mistakes in ControlLogix. Obviously, an incorrect PID setup can be frustrating. The PID instruction will not calculate the results you expect for the output. Furthermore, your loop will be unstable, and inconsistent. Common mistakes Read More »
Introduction to Successful Industrial Maintenance Training In this section, I will discuss some tips for Successful Industrial Maintenance Training. Let’s face it, training is expensive. Not only do you have the cost of the training, but also, you are paying the employees to be trained. Additionally, if they need to Read More »
Introduction to ControlLogix PID Training ControlLogix PID Training allows the students to understand certain areas of Process Control. PID is Proportional, Integral, and Derivative. For example, we have a heating system. The goal is to maintain a constant temperature. Good PID control returns the temperature back to the set point Read More »
Introduction to Tuning an Arduino PID In this section, we’ll discuss Tuning an Arduino PID loop. Before we begin, it’s important to familiarize ourselves with what PID is. PID stands for “Proportional, Integral, and Derivative”. Don’t let the name be intimidating though. It’s just a way to provide the exact Read More »
Introduction to the ControlLogix SRTP Instruction Generally, we use the ControlLogix SRTP Instruction for heating or cooling control. We’ll just concentrate on heating control for the first part of this post. that will keep things simple. In the second part of this post, we’ll discuss a heat/cool process. With heating Read More »
Introduction to ControlLogix Rate Limiter (RLIM) We use the ControlLogix Rate Limiter (RLIM) to slow the rate of change from a tag. For example, if the operator changes a setpoint, we might not want to feed the new setpoint directly to a PID. This could cause a large bump in Read More »
Introduction to the ControlLogix Lead/Lag Instruction (LDLG) The ControlLogix Lead/Lag Instruction (LDLG) is useful in PID Loops. We might use this with the FeedForward (FF), or Bias input. The purpose of the Feed Forward is to anticipate changes. For example, if our load changes, we can immediately offset the output Read More »
Introduction to Independent PID with ControlLogix In this section we’ll set up an Introduction to Independent PID with ControlLogix. Realize the equation is different than the dependent mode. For detailed information on the PID instruction, visit the ControlLogix Instruction Set Reference Manual. The PID instruction is in chapter 13. With Read More »
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 »
