1 Scope

The OPC 40084 series provides OPC UA information models for extrusion. The different parts describe the extrusion line as a whole, and the different components. This part provides general types that are used for extrusion. Together with OPC 40083, which defines general type definitions for the complete sector plastics and rubber machinery, it is the basis for all other parts.

Different architectures are possible for the information flow between the components of an extrusion line and towards an MES. With the separated information models for the different components of an extrusion line three scenarios (and combinations of them) are possible:

Each component has an own OPC server and is connected directly to an MES

A line control collects all data from the components and forward these to the MES. The exchange between the line control and the components can be realised by OPC UA, but also by other technologies (e.g. field bus, EUROMAP 27)

The line control is included in an extruder

A server providing information for several components inside one extrusion line (here with the LineId “42”) would have the following structure (example):

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies

OPC 10000-1, OPC Unified Architecture - Part 1: Overview and Concepts

OPC 10000-1

OPC 10000-2, OPC Unified Architecture - Part 2: Security Model

OPC 10000-2

OPC 10000-3, OPC Unified Architecture - Part 3: Address Space Model

OPC 10000-3

OPC 10000-4, OPC Unified Architecture - Part 4: Services

OPC 10000-4

OPC 10000-5, OPC Unified Architecture - Part 5: Information Model

OPC 10000-5

OPC 10000-6, OPC Unified Architecture - Part 6: Mappings

OPC 10000-6

OPC 10000-7, OPC Unified Architecture - Part 7: Profiles

OPC 10000-7

OPC 10000-8, OPC Unified Architecture - Part 8: Data Access

OPC 10000-8

OPC 10000-16, OPC Unified Architecture - Part 16: State Machines

OPC 10000-16

OPC 10000-100, OPC Unified Architecture - Part 100: Devices

OPC 10000-100

OPC 40001-1, OPC UA for Machinery - Part 1: Basic Building Blocks

http://www.opcfoundation.org/UA/Machinery/

OPC 40083: OPC UA interfaces for plastics and rubber machinery – General Type definitions

http://www.opcfoundation.org/UA/PlasticsRubber/GeneralTypes

3 Terms, definitions and conventions

3.1 Overview

It is assumed that basic concepts of OPC UA information modelling are understood in this specification. This specification will use these concepts to describe the OPC 40084-1 Information Model. For the purposes of this document, the terms and definitions given in the documents referenced in Clause 2 apply.

Note that OPC UA terms and terms defined in this specification are italicized in the specification.

3.2 Conventions used in this document

The conventions described in OPC 40083 apply.

4 General information to OPC UA interfaces for plastics and rubber machinery and OPC UA

For general information on OPC UA interfaces for plastics and rubber machinery and OPC UA see OPC 40083.

5 Use cases

OPC 40084-1 provides Object, Data and Variable Type definitions to be used in the following parts of the OPC 40084 series for extrusion. The intention is to create an interoperability between the different machines in an extrusion line.

6 ExtrusionDeviceType

6.1 ExtrusionDeviceType Definition

This OPC UA ObjectType is used as base type for all components of an extrusion line (except the information model describing the extrusion line as a whole). This ObjectType is abstract, the different components of an extrusion line use derived Types with the necessary specific extensions.

6.2 LineId

This Property indicates to which extrusion line the extruder belongs to (e.g. “blown film line 2”).

6.3 Identification and MachineryBuildingBlocks

The MachineIdentificationType is defined in OPC UA for Machinery (OPC 40001-1) and provides basic information on a machine/device.

For the InstanceDeclaration the ModellingRules of the Properties Model and DeviceClass are overridden to mandatory and the Property ControllerName is added.

The Object MachineryBuildingBlocks contains building blocks from OPC UA for Machinery as defined in OPC 40001-1. For this version of OPC 40084-1, the Object uses the two AddIns MachineryItemState and MachineryOperationMode, where for the first a sub-state machine with substates for Executing is added.

The ControllerName Property represents the name of the machine controller (e.g. “CP22xx”).

6.3.1 Extension of MachineryItemState

For this specification the MachineryItemState defined in OPC UA for Machinery is extended by a SubStateMachine for the State Executing.

For this, the ExtrusionMachineryItemState_StateMachineType is defined in Table 3.

The InstanceDeclarations of the ExtrusionMachineryItemState_StateMachineType have additional Attribute values defined in Table 4

The components of the ExtrusionMachineryItemState_StateMachineType have additional References which are defined in Table 5. As extension to the MachineryItemState_StateMachineType the State Executing gets an additional reference to the ExtrusionExecutingSubState.

6.3.2 Definition of ExtrusionExecutingSubState_StateMachineType

The ExtrusionExecutingSubState_StateMachineType is used for a SubStateMachine which divides the Executing State into ReadyToRun, ManualRun and ControlledRun. This SubStateMachine is not active if the parent State Executing is not active. In this case the CurrentState and LastTransition Variables of the ExtrusionExecutingSubState state machine shall have a status equal to Bad_StateNotActive.

The difference between NotExecuting and ReadyToRun is that in he state NotExecuting also the heating is switched off and in the state ReadyToRun it is switched on (but no movement of the screw).

The InstanceDeclaration of the ExtrusionExecutionSubState_StateMachineType has additional Attribute values defined in Table 7.

The components of the ExtrusionExecutingSubState_StateMachineType have additional References which are defined in Table 8.

6.4 MachineConfiguration

The MachineConfigurationType is defined in OPC 40083 and provides information on the current configuration of a machine/device.

6.5 IsPresent

The IsPresent Property provides information if the component is physically installed and connected.

NOTE: Can be False e.g. when an external server is used for component.

6.6 Target

This Property informs where the material/melt from this device goes to (e.g. the target of an extruder can be a die, but also a melt-pump). The value shall be equal to the value of the Property UserMachineName inside the MachineConfiguration Object of the relevant component.

Note: Using the NodeId of the device not possible because the components may have different servers. In this case the NodeIds are not unique in the complete extrusion line. It is also possible to fill a descriptive String in the Target property if the target component has no OPC UA representation.

6.7 Strand

Strand is used when several products (two pipes is parallel, foil cut into several smaller foils) are produced in parallel. It is only used for a component, which can be unambiguously assigned to one of the products.

6.8 ElectricalEnergy

Electrical energy of the component. The EnergyType is defined in OPC 40083.

6.9 FluidEnergy

Energy for the cooling of the component with fluid. The EnergyType is defined in OPC 40083.

6.10 PressureAir

Consumption of pressure air of the component (volume at standard conditions). The EnergyType is defined in OPC 40083.

6.11 Maintenance

The MaintenanceType is defined in OPC 40083.

6.12 StartDevice

This Object is used to give information on the starting status of a device and optional to switch devices on and off via the interface. The StartDeviceType is defined in OPC 40083.

6.13 AdditionalMeasuringDevices

This Objects is a container for possible additional measuring devices used in the component. The MeasuringDevicesType is defined in OPC 40083.

NOTE: “Additional” because the specifications for the concrete components may define some fixed types of measuring devices (e.g. for temperatures, pressures…).

6.14 ProductionDatasetManagement

The ProductionDatasetManagementType is defined in OPC 40083 and provides functionalities for the management of recipes/machine settings.

6.15 SupportedLogbookEvents

This list of LogbookEventsEnumeration gives information which LogbookEvents are supported by the machine. The LogbookEventsEnumeration is defined in OPC 40083.

6.16 Events

A Component may generate Events of MessageConditionType and LogbookEventType (see OPC 40083).

NOTE: Which logbook events are supported is stored in SupportedLogbookEvents.

7 ExtrusionMessageClassificationEnumeration

This Enumeration specifies the values to be used in the Classification property in the MessageConditionType and related logbook events to indicate which machine part has caused the message. These events are fired by the instance of the ExtrusionDeviceType and are defined in OPC 40083.

8 TemperatureZones

8.1 ExtrusionTemperatureZonesType

This ObjectType is a container for temperature zones inside of a component of an extrusion line. It is formally defined in Table 10.

When instances for temperature zones are created, the BrowseNames shall be “TemperatureZone_<Nr>” where <Nr> is a three-digit number with leading zeros, starting with “001”. The ExtrusionTemperatureZoneType is defined in Table 11.

StartTempering: Main switch for all temperature zones in the container. The single zones have own switches/status AND-connection!

8.2 ExtrusionTemperatureZoneType

This ObjectType represents one temperature zone inside of a component of an extrusion line. It is formally defined in Table 11.

NOTES: The temperature of the zone is stored inside the MonitoredParameter object of the MeasuringDeviceType. The TemperatureZoneType differs from the TemperatureZoneType defined in OPC 40083 to make use of the new MeasuringDeviceType.

8.2.1 NominalHeatingPower

Indication of the nominal heating power of the zone in kW. If the zone is only a cooling zone, this variable is not used.

8.2.2 NominalCoolingPower

Indication of the nominal cooling power of the zone in kW. If the zone is only a heating zone, this variable is not used.

8.2.3 ControllerOutput

Actual ratio of the used nominal power in %. Values from -100 (=max. cooling) to +100 (max. heating).

8.2.4 ElectricalCurrent

Actual electrical current of the zone in A.

9 Rolls and Gaps

Several machines in an extrusion lines (e.g. calenders) contain rolls and gaps between rolls.

9.1 RollsType