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The Witness system supports integration with many different types of external systems through the use of plugins. These are stand-alone software libraries which are dynamically loaded by the Integration Manager and contain code which knows how to convert the Witness data into the required format for the external system. Navtech Radar can easily develop bespoke plugins to interface with a specific type of equipment or application. The OPC Server plugin has been developed to provide integration to the common OPC UA standard used in highway systems.
Installing the OPC Server Plugin
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OPC
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The plugin can be selected during setup and required files will automatically be installed in the correct location. |
When installing Witness, in the Choose Components page of the Witness Setup wizard, open Integration Plugin options and select ICD007:
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UA Client Prerequisites
The OPC UA client used to connect to the OPC server must login through a Username and Password channel. Other authentication methods are not supported.
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Configuring the OPC Server Plugin
When the plugin is installed and licensed, a plugin configuration with default settings is automatically generated. The settings can be viewed and edited by enabling the Config Function, then selecting the plugin in Integration Configurations, within the Configuration Tree. Configuration settings will then be available in the Configuration Panel.
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Carriageways: This section indicates the carriageways that we want to track in the OPC server. When a highway alarm is received, only an alarm matching a configured Carriageway will be processed.
Select | Carriageway Name |
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Select this to track carriageway the OPC server. | The carriageway you wish to track. |
| Warning |
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If Certificate Type is "Directory", auto create certificate can only create new certificates if OPC Foundation Redistributable is installed. If the specified certificate does not exist and new certificate cannot be created (e.g. due to the above or if Auto create Certificate is not selected), the plugin will not be able to start up. |
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Each node is listed first with Display Name, DataType and namespace : relative browse name. Child nodes are indented relative to their parent.
Witness | Folder | 1:Witness | |||||
Heartbeat | Int32 | 1:Heartbeat | |||||
ManagementServerHealth | Int32 | 1:ManagementServerHealth | |||||
TrackEngineHealth | Int32 | 1:TrackEngineHealth | |||||
DatabaseHealth | Int32 | 1:DatabaseHealth | |||||
CarriagewayCount | Int32 | 1:CarriagewayCount | |||||
RadarCount | Int32 | 1:RadarCount | |||||
CarriageWays | Folder | 1:CarriageWays | |||||
Carriageway 1 | Folder | 1:Carriageway1 | |||||
SectionCount | Int32 | 1:SectionCount | |||||
Section 1 | Folder | 1:Section1 | |||||
SectionId | Int32 | 1:SectionId | |||||
Mode | Int32 | 1:Mode | |||||
RadarId | Int32 | 1:RadarId | |||||
TrafficData | Boolean | 1:TrafficData | |||||
AverageSpeed | Double | 1:AverageSpeed | |||||
AverageCount | Int32 | 1:AverageCount | |||||
Reversing Rule | Folder | 1:Rule1 | |||||
Description | String | 1:Description | |||||
Active | Boolean | 1:Active | |||||
Raised | DateTime | 1:Raised | |||||
LocationX | Double | 1:LocationX | |||||
LocationY | Double | 1:LocationY | |||||
Lane | Int32 | 1:Lane | |||||
Speed Rule | Folder | 1:Rule2 | |||||
Description | String | 1:Description | |||||
Active | Boolean | 1:Active | |||||
Raised | DateTime | 1:Raised | |||||
LocationX | Double | 1:LocationX | |||||
LocationY | Double | 1:LocationY | |||||
Lane | Int32 | 1:Lane | |||||
Section 2 | Folder | 1:Section2 | |||||
SectionId | Int32 | 1:SectionId | |||||
Mode | Int32 | 1:Mode | |||||
RadarId | Int32 | 1:RadarId | |||||
TrafficData | Boolean | 1:TrafficData | |||||
AverageSpeed | Double | 1:AverageSpeed | |||||
AverageCount | Int32 | 1:AverageCount | |||||
Reversing Rule | Folder | 1:Rule1 | |||||
Description | String | 1:Description | |||||
Active | Boolean | 1:Active | |||||
Raised | DateTime | 1:Raised | |||||
LocationX | Double | 1:LocationX | |||||
LocationY | Double | 1:LocationY | |||||
Lane | Int32 | 1:Lane | |||||
Speed Rule | Folder | 1:Rule2 | |||||
Description | String | 1:Description | |||||
Active | Boolean | 1:Active | |||||
Raised | DateTime | 1:Raised | |||||
LocationX | Double | 1:LocationX | |||||
LocationY | Double | 1:LocationY | |||||
Lane | Int32 | 1:Lane | |||||
Person Rule | Folder | 1:Rule3 | |||||
Description | String | 1:Description | |||||
Active | Boolean | 1:Active | |||||
Raised | DateTime | 1:Raised | |||||
LocationX | Double | 1:LocationX | |||||
LocationY | Double | 1:LocationY | |||||
Lane | Int32 | 1:Lane | |||||
Sensors | Folder | 1:Sensors | |||||
Radar 1 | Folder | 1:Sensor7083798e-329d-4eb6-a4bc-4dee3553faea | |||||
LastHealth | Int32 | 1:LastHealth | |||||
LastTime | DateTime | 1:LastTime | |||||
RadarId | Int32 | 1:RadarId | |||||
Radar 2 | Folder | 1:Sensord8aec3b1-4f71-41c1-8d90-0bb0387340b0 | |||||
LastHealth | Int32 | 1:LastHealth | |||||
LastTime | DateTime | 1:LastTime | |||||
RadarId | Int32 | 1:RadarId | |||||
README | String | 1:README | |||||
OPC Login Credentials
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To log in to the OPC server with an OPC client, you can use the credential of any System user. If none exist, an admin level user may create a new one.
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