The OPC Mobile Data component is used to read and write values to remote OPC Systems Tag Parameters.

Reading and writing to remote OPC Systems Service Tags simplifies the task of reading and writing OPC data and all of the connection handling to OPC Servers is performed by the OPC Systems Service just as it does with all features of OPC Systems.NET.

If a Tag Parameter Source is defined to an OPC Item when the Tag Parameter is written to the OPC Item is also written to with the same value.

OPC Mobile Read Values

Refer to the VB.NET WinForm Example application for a full example on how to read data from OPC Systems.NET using the OPC Controls.NET Data component which performs exactly as the OPC Mobile.NET Data component.

To read values from any OPC Systems Service involves one simple method to let the OPC Systems Services which Tags you wish to read and one simple event to receive all changes and updates to the Tags you wish to read.

Use the AddTag or AddTags as many times as you desire to subscribe to both local and remote OPC Systems Services.

        Dim Tags(2) As String

        Tags(0) = "\\192.168.0.1\Ramp.Value"

        Tags(1) = "\\192.168.0.1\Sine.Value"

        Tags(2) = "\\192.168.0.1\Random.Value"

        OpcMobileData.AddTags(Tags)

Use the ValuesChanged Event to receive the requested values continuously any time the values are requested or the values change.

Private Sub OpcMobileData_ValuesChanged(ByVal Tag As String, ByVal Value As Object, ByVal Quality As Boolean) Handles OpcMobileData.ValuesChanged

Use the RemoveTag or RemoveTags as many times as you desire to unsubscribe to remote OPC Systems Services.

        Dim Tags(2) As String

        Tags(0) = "\\192.168.0.1\Ramp.Value"

        Tags(1) = "\\192.168.0.1\Sine.Value"

        Tags(2) = "\\192.168.0.1\Random.Value"

        OpcMobileData.RemoveTags(Tags)

OPC Mobile Write Values

Refer to the VB.NET WinForm Example application for a full example on how to write data to OPC Systems.NET using the OPC Controls.NET Data component which performs exactly as the OPC Mobile.NET Data component.

To write values to any OPC Systems Service involves one simple method to write the values, one simple method to let the OPC Systems Services which Tags you wish to read to confirm the value was successful, and one simple event receive all changes and updates to the Tags you wish to read.

Use the AddTag or AddTags to subscribe to both local and remote OPC Systems Services to receive back the value for confirmation.

OpcMobileData.AddTag(""\\192.168.0.1\Write OPC Output.Value")

Use the WriteTag or WriteTags to send the desired values to the tags.

OpcMobileData.WriteTag(""\\192.168.0.1\Write OPC Output.Value", 1.23)

Use the ValuesChanged Event to receive the requested values continuously to confirm the values have changed..

Private Sub OpcMobileData_ValuesChanged(ByVal Tag As String, ByVal Value As Object, ByVal Quality As Boolean) Handles OpcMobileData.ValuesChanged