Controlling Automated Manufacturing Systems by P.J. O'Grady

By P.J. O'Grady

Master construction scheduling II 60 online scheduling sixty five particular info standards sixty nine Mailbox methods 70 end seventy two bankruptcy 7: mobilephone point regulate seventy five advent seventy five CCS class seventy seven what's a phone? seventy eight CCS operational modes eighty end 86 bankruptcy eight: apparatus point keep an eye on 89 creation 89 what's intended by means of apparatus? ninety gear point keep an eye on constitution ninety two end ninety four bankruptcy nine: end and destiny developments ninety five total construction making plans and keep an eye on capabilities ninety eight destiny tendencies a hundred end 102 Appendix I: grasp construction Scheduling II 103 References 107 Index 109 Preface This booklet is meant as an creation to construction making plans and keep an eye on of automatic production structures. As such, it hyperlinks jointly varied fields of curiosity: within the quarter of creation making plans and keep watch over there's a huge physique of labor accomplished in analytical versions, laptop constructions and total platforms; both, for the and particular keep an eye on points of the apparatus used (for instance, NC machines, robots, etc), accomplished stories have additionally been accomplished. to hide each one zone absolutely might bring about a piece of a number of volumes. in its place, this booklet stresses the real parts of either parts which are important to powerful creation making plans and keep an eye on of the full computerized production system.

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This 'mailbox' facility is discussed later in this chapter. Whatever approach is used, the output of the MPS I function is a work load for the time period under consideration. This now passes to the second stage of the SCS, that of on-line scheduling. On-line scheduling The on-line scheduling function is concerned with taking the MPS II output (the viable work load for a particular planning period) and translating this into instructions to each cell control system (CCS), while taking into account both the status of the automated manufacturing system and the 65 Controlling Automated Manufacturing Systems overall requirements.

4. Unit/resource level. The tasks from the work centre level are broken into subtasks and these subtasks are carried out. Each level also has an associated feedback mechanism, whereby the occurrence of events is fed back to the level directly above. This procedure leads to a relatively decentralized structure, with decision making made at the lowest possible level commensurate with overall efficiency. Control of each level resides in the next highest level and this level issues commands to the level below.

7. Due date consideration. The consideration of delivery date or due date of an order can be of some weight in planning and controlling any automated manufacturing system. Orders that are nearing, or which have overrun, their due date will usually merit preferential treatment and this module allows for this. 8. Product release level. This module can be used to control the amount of products released in each planning period. This amount can be measured in volume terms or in any other terms (such as in monetary terms).

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