Seneca KEY-C Series User Manual page 17

The meaning of the advanced diagnostics byte is:
BYTE VALUE
0
1
2
3
4
For example:
49033 0x0000
49034 0x0002
It means that:
TAGs 1 and 2 are OK (0x00 and 0x00)
TAG 03 is in a delayed state (0x02)
TAG 4 is OK (0x00)
LAST_LOOP_TIME_COMx is a register that contains the last interrogation time of all serial tags (in how many
of 10 ms) so, for example:
49283 25
49284 42
It means that the serial 1 loop was 250ms, the serial 2 loop was 420ms.
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User Manual
MEANING
OK
TIMEOUT The response of the tag timed out, but will be
DELAYED Too many fails, tag polling is delayed (tag will
EXCEPTION Modbus exception response but the tag will be
CRC ERROR CRC Modbus exception response but the tag
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NOTE
The tag is read/written correctly
queried again
be interrogated again after the configured
quarantine time)
queried again
will be queried again
MI00725-1-EN
MODBUS TO CLOUD
"KEY-C" GATEWAYS
Page 17