Message diagnostics

The Messages diagnostic node shows data for the node and for the individual messages.

Data shown for the node includes:

• Data quality icon

• Message ID

• Number of items

• Number of items with errors

• Status

  Note: Items shown below the Messages diagnostic node in the hierarchy depend on how an Communication Driver developer has customized the code and configuration of an individual Communication Driver.

  The following table describes the status icons for the normal, warning, and error conditions of messages:

  Icon State	Icon Color	Message
  Normal		The OPC quality is good for all items in this message.
  Warning		The OPC quality is uncertain or bad for at least one item in this message, and the OPC quality is good for at least one item.
  Error		The OPC quality is uncertain or bad for all items in this message.

Both messages and message items are always marked as active. The data for an individual message item includes:

• Data quality icon

• Name of item

• Read/write status

• Value

• Time

• Quality

• Message ID (MsgID)

• Location

The R/W Status column displays:

• R for read/refresh/property messages

• W for write messages

• R/W for both read/refresh/property and write messages

For more information, see R/W items in diagnostics.

The Location column shows the path of the hierarchical item name.

The following table describes the status icons for the normal, warning, and error conditions of message items:

Note: Items below the root level in this hierarchy are subject to customization and configuration of individual Communication Driver.