WEBfactory 2010

OPC Signal Quality Codes (returned by OPC-Connections)

Abstract

Check out this article and learn more details about the WEBfactory 2010 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 manually 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.