Introduction to the ControlLogix Enhanced Select (ESEL) Instruction All things considered, the ControlLogix Enhanced Select (ESEL) simply selects between tags to choose the best suited value to use in logic. For example, if you have two process variables for a PID, you might select the lowest, highest, or average of Read More »
Introduction to How to use RLIM The ControlLogix Rate Limiter (RLIM) slows the rate of change coming from a tag. Specifically, we usually use this for a set point. When an operator changes the setpoint on a PID instruction, there is an immediate change in the error. This change in Read More »
ControlLogix Moving Average (MAVE) The ControlLogix Moving Average (MAVE) allows you to smooth out a noisy process variable. In other words, if your signal is bouncing around, the MAVE instruction will smooth it out. For example, let’s consider a flow rate. Because of disturbances in the flow of a liquid, Read More »
