Demonstration Scenario Application

Production of Industrial Traffic Lights

Demonstration Scenario executes a process that produces an industrial traffic light in a simulated environment. In this context, the user can configure the composition of lights and the number of light segments. Besides, the user can choose between multiple shapes for the stand segment of the traffic light. The corresponding PFDL description is shown below, were the structure SWAP_Order defines the properties of a traffic light. The overall process is split into 5 steps and contains two parallel subprocesses, the Manufacture Light Segments and the Manufacture Stand Segment process. After completion, the parts that are produced within the subprocesses are mounted together in step 5:

• Manufacture Light Segments:

  • 1. GetPartsFromWarehouse: one or multiple light segments are taken from the warehouse and brought to the coating machine

  • 2. Coating: the light segment gets painted in the selected color

  • 3. Gluing: all light segments are glued together

• Manufacture Stand Segment:

  • 1. GetPartsFromWarehouse: a stand segment is taken from the warehouse and brought to the coating machine

  • 4. Milling: milling of the stand segment into the selected shape

• 5. Mounting: mounting of the light segments onto the stand segment

Task productionTask
    Parallel
        manufacture_light_segments
            In
                SWAP_Order
                {
                    "order_id":1000,
                    "stand":{
                        "stand_shape":"plate",
                        "stand_height":3,
                        "stand_id": "Default"
                    },
                    "segments":
                    [
                    {
                        "color": "red",
                        "diameter": 5,
                        "segment_id": "Default"
                    }
                    ],
                    "number_light_segments": 1
                }
        manufacture_stand_segment
            In
                SWAP_Order
                    {
                        "order_id":1000,
                        "stand":{
                            "stand_shape":"plate",
                            "stand_height":3,
                            "stand_id": "Default"
                        },
                        "segments":
                        [
                        {
                            "color": "red",
                            "diameter": 5,
                            "segment_id": "Default"
                        }
                        ],
                        "number_light_segments": 1
                    }
    Mounting
End

Task manufacture_light_segments
    In
        order: SWAP_Order
    Parallel Loop i To order.number_light_segments
        manufacture_light_segment
            In
                order
    Loop i To order.number_light_segments
        Gluing
            In
                order
End

Task manufacture_stand_segment
    In
        order: SWAP_Order
    GetPartsFromWarehouse
        In
            order
    Milling
        In
            order
End

Task manufacture_light_segment
    In
        order: SWAP_Order
    GetPartsFromWarehouse
        In
            order
    Coating
        In
            order
End

The corresponding visual representation, generated by the SWAP-IT Dashboard is illustrated below. The PFDL definition contains a set of PFDL conditions, namely a Parallel Condition, a Parallel Loop Condition and a Counting Loop. These conditions are based on process parameters, in this context, the SWAP_Order.number_light_segments parameter. Consequently, changing this value will result in a different process, since the number of process steps in the Parallel Loop Condition and the Counting Loop will increase or decrease.

Shop Floor Configuration

To produce the industrial traffic light, a corresponding shop floor with resources is required. For this scenario, the shop floor consists of

• 2 Warehouses

• 3 Coating Machines

• 1 Milling Machine

• 1 Gluing Machine

• 1 Assembly Station

Information Models

Since the Demonstration Scenario shop floor includes 5 different types of resources, it is required to define corresponding information models. These models extend the Common Information Model for each of the resource classes. More information on how to build these custom information models can be found in the Common Information Model Repository.

In this context, it is required that the browse name of the added OPC UA methods correspond to service names in the PFDL description. The advanced tutorial in the Demonstration Scenario repository recreates the Demonstration Scenario environment, so that all information models for the Demonstration Scenario application can be found in this Tutorial.

The following SubTypes of the ModuleType are defined for the Demonstration Scenario application:

• Information model containing the PFDL parameter:

• PFDL Parameter Namespace

• WarehouseModuleType with the method GetPartsFromWarehouse

• Warehouse Namespace

• CoatingModuleType with the method Coating

• Coating Namespace

• MillingModuleType with the method Milling

• Milling Namespace

• GluingModuleType with the method Gluing

• Gluing Namespace

• MountingModuleType with the method Mounting

• Mounting Namespace