The IEC 60870-5-103 protocol diagnostic counters can be viewed via menu path . Counters related to the IEC 60870-5-103 link instances 1 and 2 have the suffixes (n) 1 and 2. The diagnostic counters show complete IEC 60870-5-103 link frames and link errors.
The serial drivers (COMn) have their own diagnostic counters for lower-level serial communication character, error and link messages. The COMn counters count all the messages on the serial line. COMn Link status is “Up” when IEC 103 protocol is defined to the port, the cable is correctly connected and there is an IEC 103 master polling on the line. It is possible to reset the diagnostic counters by setting the Reset counters value to “True”. The IEC 60870-5-103 instance Status is “True” when COMn Link status is “Up” and there is an IEC 103 master polling on the line. When the Status of the IEC 60870-5-103 instance has never been “True”, the diagnostic counters belonging to the instance contain value “-1”. Counter value “0” in turn means that the instance is in use, but no messages have been detected.
The diagnostic status indication automatically turns from "True" to "False" when there has not been any incoming IEC 60870-5-103 messages directed to the IED within 15 seconds. The STATUS indication output is also visible in the I3CLPRT function blocks through the Application Configuration tool (ACT) in PCM600. This output can be used, for example, to lit a dedicated "Communication Error" LED on the front panel.
| Attribute | Values (range) | Default | Description |
|---|---|---|---|
| Status | False = Communication inactive True = Communication active |
False | Status (read) |
| Reset counters | False/True | False | True (reset) |
| Received frames | -1...2147483646 | Received frames | |
| Checksum errors | -1...2147483646 | Checksum errors | |
| Transmitted frames | -1...2147483646 | Transmitted frames |