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

Metasys Site Management Portal Help

Brand
Metasys
Product name
Site Management Portal
Document type
User Guide
Document number
LIT-1201793
Version
12.0.50
Revision date
2023-06-02
Language
English

This object contains attributes common to many Metasys system objects. This section includes attributes of the Focus/Configuration tab. See the Object and Feature Tabs section for information on the attributes that appear on the other tabs of this object (for example, the Hardware and Options tab appear on point objects).

Note: In the Notes and BACnet Notes columns, letters indicate the following: B - Exposed as standard BACnet property, C - Configurable, D - Default Attribute for Display, N - Value Not Required, R - Affected by Extension’s Reliability, W - Writable.
Table 1. Analog Input Object Attributes - Focus/Configuration Tab

Attribute Name

Notes

BACnet Notes

Initial Value

Descriptions
COV Increment

C,W

B,W

0.1

For MS/TP Analog Inputs, COV Increment may not be writable, based on its configuration.

Device Type

C,N,W

C,N,W

Null

Contains a description of the physical device connected to the object.
Display Precision

C,W

C,W

10ths

Defines the decimal rounding and the decimal places to display for the Present Value and associated attributes.
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

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

C,W

B,W

-1.7E38

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

C,W

B,W

False

De-couples the object from the physical input. When Out of Service is True, the object de-couples the Present Value and Reliability from the hardware. The Reliability is writable when Out Of Service is True. When de-coupled, the Present Value can be changed to simulate specific conditions or for test purposes.

Additionally, the Out of Service state of the Status Flags attribute is set to True and the Fault state is decoupled from the physical input when Out of Service is True.

Out of Service Expiration Time

Unspecified

Holds the time and date of when the Temporary Out-of-Service command last issued expires. The time and date to expire is calculated by adding the duration specified for the Temporary Out of Service command to the current time. Once the current time becomes equal to the time mentioned in this attribute, the Out of Service attribute is set to False.

Present Value

DNRW

DNRW

 
Reliability

W

B,W

Reliable

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.

Resolution  

B

 

Indicates the smallest possible change in Present Value (in engineering units) and is equal to the Display Precision. This attribute has the data type required by the standard BACnet property.

Status Flags  

B

False,

False,

False,

False

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

C,W

W

Deg F

Indicates the engineering measurement units used by the object.
Update Interval  

B

0

Indicates the time period (in hundredths of a second) between updates to Present Value when the input is not overridden or out of service.

Use COV Min Send Time

W

 

False

Use Remote Alarming  

B,C,W

False

When the attribute Intrinsic Alarming Defined is set to True, determines where alarms for the object originate. If the remote integrated object contains attributes for originating alarms, then Use Remote Alarming defaults to True, causing the local mapper object to accept alarms from the remote integrated object that are routed to the NxE. If the remote integrated object does not contain attributes for originating alarms, then Use Remote Alarming defaults to False causing the local mapper object to originate alarms. When Use Remote Alarming is false, any alarms from the remote integrated object are ignored at the NxE. If the value of Use Remote Alarming is changed, a restart of the NxE may be required to assure correct operation. This attribute applies only to BACnet integrations.