Siemens MindConnect IoT2040 - Page 106

If the data provider (e.g. S7 PLC, OPC UA Server) is not available, the MindConnect IoT2040 or
the data provider client will send up a "0" with a quality code. The value of the quality code
shows that this is not a valid data.
If the function "Quality code" is enabled for this data point all the information can be stored in
the database. The database creates a request to Insights Hub Monitor to show the bad
quality code information in a chart.
If the function "Quality code" is disabled, the value 0 will be saved anyway. But you cannot
figure out if this data is valid.
8.4 Quality codes OPC UA and S7 protocol
The following table is based on the OPC UA standard and shows the possible quality codes for
OPC UA and S7:
Quality code
(hex)
Quality code
(dec)
Short description Long description
0x00000000 0 GOOD Good, all items could be read.
0x00BA0000 12189696 GOOD_INCOMPLETE
Good results may be incomplete - at
least one item could be read.
0x002F0000 3080192 GOOD_OVERLOAD
Sampling has slowed down due to
resource limitations.
0x40920000 1083310080 UNCERTAIN_INITIAL_VALUE Uncertain Initial Value - initial value.
Appendix
8.4 Quality codes OPC UA and S7 protocol
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System Manual 8/2023 106