The Server Statistics display shows statistics for the selected server. The number of transmits, receives and errors displayed are for all groups and items configured for the server. You can also see the number groups and items on the server, the server’s connection status, the server’s start time and current time, the time of the last update sent to the driver, and the version number of the server’s software.
To display a server’s statistics, select the server in the Tree Browser and then choose Stats Mode from the Display Mode menu.
The following table lists and describes the fields and buttons that are visible in the Server Properties Viewer in Stats Mode:
Transmits
Displays the number of messages sent from all items on all the groups configured for the selected server.
Example:
- Number of groups configured for the driver = 4
- Number of messages sent on Group1 = 30
- Number of messages sent on Group2 = 15
- Number of messages sent on Group3 = 20
- Number of messages sent on Group4 = 10
- Total number of messages sent = 75
- Transmits field displays: 75
Receives
Displays the total number of messages received from the OPC server, including both synchronous and asynchronous callbacks.
Errors
Displays the total number of errors sent from the selected server.
Errors occur when:
- The OPC server rejects a read or write request.
- You specify an invalid Item ID or access path from the OPC server.
For more information about the cause of the error, examine the Last Error field in the OPC item statistics.
Number of Groups
Displays the number of groups configured for the selected server.
Number of Items
Displays the number of items configured on all the groups for the selected server.
Write Queue Count
Displays the number of write requests that are pending for the server.
Vendor Info
Displays a vendor-supplied string describing the OPC server. Typically, this information includes the vendor’s name and software version number.
Server Status
Displays the current status of the OPC server. Possible values include:
- Not Connected
- Suspended, No Data
- Running
Bandwidth
Displays OPC server specific information. One possible, and the suggested, use is to show the approximate percent of bandwidth currently in use by the OPC server.
Start Time
Displays the time and date that the OPC server started. The time is displayed in universal time (Greenwich Mean Time).
Current Time
Displays the server’s current time and date. The time is displayed in universal time (Greenwich Mean Time).
Last Update
Displays the time and date that the server sent its last data update to the driver. The time is displayed in universal time (Greenwich Mean Time).
Major Version
Displays the major version of the OPC server software.
Minor Version
Displays the minor version of the OPC server software.
Build Number
Displays the build number of the OPC server software.
Connection In Use
Displays the current connection in use by the server.
Troubleshooting
When clicked, this button displays the Troubleshooting help page.
Server Dialog Refresh Status
Displays the primary refresh rate and the refresh status for the selected server.
See Also
