As the OPC UA model shall be universal for flat glass processing, resulting major requirements are deducted.
One of them is that we have different types of transformation processes:
- One to many: Cutting, where raw glass panes are cut into multiple glass elements
- One to one: Mainly single glass element transformation processes such as edge and surface works, heat treatment, painting
- Many to one: Classical assembly processes such as lamination and insulating glass fabrication
- In order to establish an OPC UA Model suitable to the different processes, the main requirements of information transport and modelling, established over years in the glass industry, shall be integrated. A job is defined as concrete work order for one or more glass elements. For the transformation, the job may reference to preadjusted work recipes in the respective machines or production lines recipes by means
- Jobs can be grouped in a job group (as a set of job in a fix order)
- The order of jobs and of job groups may be changed
- Each job group and job have a status (see ProductionStateMachine)
- Each transformation process is one job, e.g.,
- Cutting 100 raw glass panes requires 100 jobs as each pane will be cut in an individual pattern.
- IG Line production of a lot requires an individual setting for each glass element produced.