OPC Signal Quality Codes
Check out this article and learn more details about the i4scada OPC Signal Quality Codes returned by OPC Connections.
Member Name | Value Description |
|---|---|
GOOD 192 | The value is good. |
GOOD_LOCAL_OVERRIDE 216 | The value has been overridden. Typically this means that the input has been disconnected and a manual value has been forced. |
BAD 0 | The value is bad but no specific reason is known. |
BAD_CONFIG_ERROR 4 | There is a server specific problem with the configuration. |
BAD_NOT_CONNECTED 8 | The input is required to be logically connected to something but the connection couldn't be established. |
BAD_DEVICE_FAILURE 12 | A device failure has been detected. |
BAD_SENSOR_FAILURE 16 | A sensor failure has been detected. |
BAD_LAST_KNOWN 20 | Communications have failed. However, the last known value is available. |
BAD_COMM_FAILURE 24 | Communications have failed. No last known value is available. |
BAD_OUT_OF_SERVICE 28 | The block is off scan or otherwise locked. |
BAD_WAITING_FOR_INITIAL_DATA 32 | The initial quality for the data items added to a subscription. |
UNCERTAIN 64 | There is no specific reason why the value is uncertain. |
UNCERTAIN_LAST_USABLE 68 | The last usable value. |
UNCERTAIN_SENSOR_CAL 80 | Either the value has pegged at one of the sensor limits (in which case the limit field should be set to 1 or 2) or the sensor is otherwise known to be out of calibration. |
UNCERTAIN_EGU_EXCEEDED 84 | The returned value is outside the limits defined for this parameter. Note that in this case, the limit flag indicates which limit has been exceeded. |
UNCERTAIN_SUB_NORMAL 88 | The value is derived from multiple sources and has less than the required number of good sources. |
QUALITY_NOT_SET 65535 | The quality is not set. |