Analog Value Attributes - Metasys - LIT-1201793 - Software Application - Metasys Site Management Portal - 12.0.50

Connected To Internal Application

B, W

No

No or Yes

Indicates whether the object is connected to an internal application.

COV Increment

C,W

B,W

0.01

Any value > 0

Defines the minimum change in the Present Value required for the object to report a change.

The COV Increment attribute is required if the object supports COV reporting.

Current Command Priority

B

1 - 16

Indicates the command priority currently assigned to the object. A blank in this field indicates the object is not under any command.

Display Precision

C,W

C,W

10ths

Failsoft Currently Active

Yes or No

Specifies whether the Failsoft feature is currently overriding the input value to a reliable default. If No, Failsoft is disabled or, if Failsoft is enabled, the value is reliable. If Yes, Failsoft is enabled and the value is unreliable. This attribute is only used if Property Ref Value is defined to reference an application.

Intrinsic Alarming Defined

C

False

Enables the BACnet Intrinsic Alarming feature in the object and the definition of related attributes. For detailed information, see BACnet Intrinsic Alarming.

Max Value

C,W

B,W

1.7E38

This value is not writable for FEC objects.

This value is writable if the AV is the ZN-SP on a Net Sensor. This method is the only way to set the range for the Net Sensor.

Defines the highest reliable value (in engineering units) for the Present Value.

This value is not writable for Analog Value objects in the FEC.

This value is writable if the AV is the ZN-SP on a Net Sensor. This method is the only way to set the range for the Net Sensor.

Min Value

C,W

B,W

-1.7E38

This value is not writable for FEC objects.

This value is writable if the AV is the ZN-SP on a Net Sensor. This method is the only way to set the range for the Net Sensor.

Defines the lowest reliable value (in engineering units) for the Present Value.

This value is not writable for Analog Value objects in the FEC.

This value is writable if the AV is the ZN-SP on a Net Sensor. This method is the only way to set the range for the Net Sensor.

Monitor Only

False

Defines the behavior of the object as an input or output. If you do not specify a Property Ref Value, the attribute is set to False. This attribute appears only in the Snapshot Focus view.

Out of Service

W

False

Always False

This attribute is always False for this object due to the absence of hardware.

Present Value

D,R,W

D,R,W

Indicates the current value of the analog value. Present Value is optionally commandable. The optional Priority Array must be present for Present Value to be commandable. Values written to Present Value are compared with the Min Value and Max Value attributes and set the Reliability.

Priority Array

Contains prioritized commands in effect for the object. The highest priority command is sent to the Present Value attribute.

Property Ref Value

N

Object Name, Reference, Attribute

Specifies an object and attribute (usually from an application) for which the AV object is providing the standard interface. The object and attribute contained in this attribute must be a local object and is often a non-BACnet data source and destination. When this property is not defined, the Monitor Only property is set to False. This attribute appears only in the Snapshot Focus view.

Referenced Reliability

No Input

Specifies the current reliability of the value sent to or from the object/attribute referenced by Property Ref Value. This attribute is only used if Property Ref Value is defined to reference an application.

Referenced Value

Specifies the current value sent to or from the object/attribute referenced by Property Ref Value. This attribute is only used if Property Ref Value is defined to reference an application.

Referenced Value COS Count

W

0

Counts how many times the Present Value and Reliability have changed. If the Monitor Only attribute is True, the count is how many times the Property Ref Value has updated the AV. If Monitor Only is False, the count is how many times Property Ref Value has updated the AV. This attribute helps to diagnose excessive changes that can cause logic to execute taking up too much bandwidth. Reset the count by entering 0 for this attribute. This attribute is only used if Property Ref Value is defined to reference an application.

Reliability

W

B,W

Reliable

See the attribute description for details on Reliability.

No Fault Detected (Reliable), Over Range, Under Range, Unreliable Other

Indicates whether the Present Value is unreliable.

Examples:

Reliable - No detectable faults

Unreliable High - Present Value is greater than the Max Value.

Unreliable Low - Present Value is less than the Min Value.

When Out of Service is True, the Reliability attribute may be written directly.

Status Flags

B

False,

False,

False,

False

See the attribute description for details on Status Flags.

In Alarm, Fault, Overridden, Out of Service

Indicates the general status of the Analog Input object in BACnet terms and contains four independent states. The four flags are:

In Alarm - False if the Event State attribute value is Normal; otherwise, the In Alarm flag is True. (Set only by BACnet Intrinsic Alarming.)

Fault - True (1) if the Reliability attribute is not reliable; otherwise, the Fault flag is False.

Overridden - Overridden flag is True if the Present Value is overridden at the hardware source level.

Out of Service - Out of Service flag is True if the Out of Service attribute value is True; otherwise, the Out of Service flag is False.

Units

W

W

Blank

Use Remote Alarming

B,C,W

False