The I/O Driver Statistics display shows statistics for the I/O driver. This is the highest level of driver statistics and provides information about the entire system. The number of transmits, receives, and errors are displayed for all servers, groups, and items in the current configuration. To display the driver’s statistics, select the I/O driver icon in the Tree Browser and then choose Stats Mode from the Display Mode menu.
The following describes the fields and buttons that are visible in the I/O Driver Properties Viewer in Stats Mode:
Transmits
Displays the number of messages sent to all OPC servers.
Example:
- Number of servers configured for the driver = 2
- Number of messages sent on Server1 = 560
- Number of messages sent on Server2 = 220
- Total number of messages sent = 780
- Transmit Count field displays: 780
Receives
Displays the total number of messages received from all OPC servers, including both synchronous and asynchronous callbacks.
Errors
Displays the total number of errors sent from all OPC servers.
Errors occur when:
- The OPC server rejects a read or write request.
- An exception occurs in the OPC server.
- The driver is unable to make an asynchronous connection to an OPC server.
For more information about the cause of the error, examine the Last Error field in the OPC item statistics.
Troubleshooting
When clicked, this button displays the Troubleshooting help page.
See Also
