Quality codes Modbus protocol¶
The following table shows the possible quality codes for devices that use the Modbus protocol:
| Quality code (hex) | Quality code (dec) | Short description | Long description |
|---|---|---|---|
| 0x00000000 | 0 | Good | No error occurred |
| 0x80050000 | -2147155968 | Communication error | Modbus connection reset for connection |
| 0x80310000 | -2144272384 | No communication | Communication with the data source is defined but not established and there is no last known value available |
| 0x803A0000 | -2143682560 | Not readable | The access level does not allow reading or subscribing to the node |
| 0x80790000 | -2139553792 | No subscription | There is no subscription available for this session |
| 0x80AB0000 | -2136276992 | Invalid argument | One or more arguments are invalid |
| 0x80330000 | -2144141312 | NodeIdInvalid | Parser bad node syntax |
| 0x809E0000 | -2137128960 | Data unavailable | Expected data is unavailable for the requested time range due to an unmounted volume, an offline archive or tape, or similar reason for temporary unavailability |
| 0x809F0000 | -2137063424 | Entry exists | The data or event was not successfully updated because no matching entry exists |
| 0x803C0000 | -2143551488 | Out of range | The value was out of range |
| 0x80270000 | -2144927744 | Session not activated | The session cannot be used because ActivateSession has not been called |
| 0x808B0000 | -2138374144 | Device failure | There has been a failure in the device/data source that generates the value that has affected the value |
| 0x803D0000 | -2143485952 | Not supported | The server cannot retrieve a bound for the variable |
| 0x80630000 | -2140995584 | Type definition invalid | The type definition node ID does not reference an appropriate type node |
| 0x800D0000 | -2146631680 | Server not connected | The operation could not complete because the client is not connected to the server. |
| 0x80730000 | -2139947008 | Write not supported | The server does not support writing the combination of value status and timestamps provided |
| 0x807D0000 | -2139291648 | Data source busy | Previous read request of data source is still in progress |
Last update: January 22, 2024