Operators are often aware of oscillating loops, but when the cause is unknown, the oscillating loops are often being put in manual mode or neglected. None of these measures maintain the benefit of automatic control.
Oscillating control loops can be mitigated by proper diagnosis of control loops. This can be used to identify improvement potential and distinguish between tuning issues and physical hardware issues. The ABB Performance and Solutions group can carry out this diagnosis and recommend an implementation plan to realize improvement opportunities for any automated process. Furthermore, a continuous maintenance service is offered to help sustain the high process control performance level. The continuous maintenance service monitors and handles the process control performance impact of changes in operational conditions, production rates and control equipment – ensuring continuous optimal process control performance.