Tag Archive: aliasing

Jul
11

Commissioning Control Systems – Input Filtering

The method used to process analog inputs and outputs is unique to each control system.  Also, controller and IO bus design influence how often measurement and outputs are updated and thus dictate the control execution rate that is supported by the control system. Understanding the limitations imposed by the basic control system design (i.e., controller …

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Oct
14

Guidelines for Setting Filtering and Module Execution Rate

Many digital controllers used in the process industry today allow the end user to specify the control loop period of execution. However, books on process control often provide little or no information on how execution period impacts control performance. Also, no mention is made of the fact that the amount of filtering needed to avoid …

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