This paper presents a technique to optimize the communication schedules generated for synchronization of Foundation Fieldbus H1 devices in cascade control loop. A level-to-ﬂow cascade control operated by the Harmonas-DEO host system is examined as an illustrative case study. Major objectives of the optimization are not only to minimize the latency of the control loop but also to maximize the availability of the network bandwidth. The proposed technique can be applied for H1 segment macrocycle schedules performing the control functions in both of the host controller and the ﬁeld devices. Three examples for optimizing communication schedules generated from diﬀerent control block assignments are described. The validation of the optimization methods can be determined by using two metrics: control loop latency improvement and publication gap availability improvement. Experimental results conﬁrm that the proposed technique works eﬀectively to operate the studied H1 segment for cascade control without any problems.
|ジャーナル||ICIC Express Letters|
|出版ステータス||Published - 2016 1 1|
ASJC Scopus subject areas
- Computer Science(all)
- Control and Systems Engineering