The Statistics attributes of the MS/TP Field Bus Integration object Diagnostics tab (Advanced View) provide useful information about what is happening on the MS/TP bus. Table 1 describes some of the attributes and values that indicate there is a problem on the bus. For more details on the following attributes, refer to the MS/TP Field Bus Integration Attributes section of the Metasys system Help (LIT-1201793) .
Send the Latch Statistics command to the MS/TP field bus integration before comparing your values to Table 1. If the statistics have already been latched and represent old data, send the Clear Statistics command. Wait a minute or longer for new data to accumulate and send the Latch Statistics command.
For more information on statistics, refer to the Metasys system Help (LIT-1201793) .|
Attribute |
Error condition indicated |
|---|---|
|
Unexpected Frames Rxed |
Possible network disruption |
|
Packets Timed Out |
Noise, bad wiring, or another device did not respond. |
|
Framing Errors |
Noise, bad wiring, or mismatched baud rates |
|
Overrun Errors |
This node is too busy. |
|
Header CRC Errors |
Noise or bad wiring |
|
Data CRC Errors |
Noise or bad wiring |
|
Reply Too Slow Datalink Errors |
Another device is slow to respond. |
|
Reply Too Slow Application Errors |
The node is too busy to build the reply at this time. |
|
Internal Errors |
Low memory or unexpected conditions |
|
Buffer Overflows |
The node is trying to send or receive too much at this time. |
|
Lost Token |
Network disruption (includes initial startup, so 1 is common) |
|
Retries |
Problems passing the token message |