OPC UA for BACnet – BACnet: OPC UA Information Model
10.4.28 BACnetReliability
This DataType is an enumeration that defines the various fault states that may be supported by an object. Its values are defined in Table 158.
Table 158 – BACnetReliability Values
Name
Value
Description
NoFaultDetected
0
The present value is reliable; that is, no other fault has been detected.
NoSensor
1
No sensor is connected to the Input object.
OverRange
2
The sensor connected to the Input is reading a value higher than the normal operating range. If the object is a Binary Input, this is possible when the Binary state is derived from an analog sensor or a binary input equipped with electrical loop supervision circuits.
UnderRange
3
The sensor connected to the Input is reading a value lower than the normal operating range. If the object is a Binary Input, this is possible when the Binary Input is actually a binary state calculated from an analog sensor.
OpenLoop
4
The connection between the defined object and the physical device is providing a value indicating an open circuit condition.
ShortedLoop
5
The connection between the defined object and the physical device is providing a value indicating a short circuit condition.
NoOutput
6
No physical device is connected to the Output object.
UnreliableOther
7
The controller has detected that the present value is unreliable, but none of the other conditions describe the nature of the problem. A generic fault other than those listed above has been detected, e.g., a Binary Input is not cycling as expected.
ProcessError
8
A processing error was encountered.
MultiStateFault
9
The FAULT_STATE, FAULT_LIFE_SAFETY or FAULT_CHARACTERSTRING fault algorithm has evaluated a fault condition.
ConfigurationError
10
The object's properties are not in a consistent state.
CommunicationFailure
12
Proper operation of the object is dependent on communication with a remote sensor or device and communication with the remote sensor or device has been lost.
MemberFault
13
Indicates that the set of referenced member objects includes one or more Status_Flags properties whose FAULT flag value is equal to TRUE.
MONITORED_OBJECT_FAULT
14
Indicates that the monitored object is in fault.
TRIPPED
15
The end device, such as an actuator, is not responding to commands, prevented by a tripped condition or by being mechanically held open.
Its representation in the AddressSpace is defined in Table 159.
Table 159 – BACnetReliability Definition
Attribute
Value
BrowseName
BACnetReliability
IsAbstract
False
References
NodeClass
BrowseName
DataType
TypeDefinition
Other
Subtype of the Enumeration type defined in OPC 10000-5
