Different manufacturers and vendors use different PID algorithms and sometimes have several algorithms available within their own product lines. The figures and graphs used in this article were produced using the ExperTune Loop Simulator. For PID loop tuning, analysis and simulation contact ExperTune . Just as there are no adhered to industry standards for PID controllers, nomenclature and action for similar modes varies. Some manufacturers call Proportional Band the Proportional Gain.
Manufacturers interchange names and units for integral or reset action.
One is the reciprocal of the other. The action of either reset or integral can be reversed depending on the manufacturers units. There are three major classifications of PID algorithms that most manufacturer's algorithms fit under. Again, manufacturers vary on the their names for these categories. The only way to really tell which one you have is to look at the equation for the controller.