Averaging Attributes - Metasys - LIT-12011964 - Software Application - System Configuration Tool - 13.2

Metasys SCT: System Configuration Tool Help

Brand
Metasys
Product name
System Configuration Tool
Document type
User Guide
Document number
LIT-12011964
Version
13.2
Revision date
2020-01-21
Language
English

Averaging Extensions contain attributes common to Metasys system objects. For details, see Common Object Attributes.

The following table lists the attributes specific to the Averaging extension. Click the attribute name in the table for a description of the attribute.

Note: In the Notes column, letters indicate the following: C - Configurable, D - Default Attribute for Display, N - Value Not Required, R - Affected by Extension’s Reliability, W - Writable.
Table 1. Averaging Extension Attributes

Attribute Name

Notes

Initial Value

Values/Options/Range

Description

Input Reference

C

   

Max Value Timestamp

 

Invalid DateTime

If Average Value, Minimum Value, or Maximum Value is Unreliable, the timestamp is Undefined.

Min Value Timestamp

 

Invalid DateTime

If Average Value, Minimum Value, or Maximum Value is Unreliable, the timestamp is Undefined.

Object Property Ref

     

Valid Samples

     

If any of these variables are Unreliable and a BACnet read is performed on the following three attributes, the values returned are NaN for Average Value, -INF for Minimum Value, and INF for Maximum Value. If these values are Unreliable and a BACnet read is not performed, the attributes return zero.

Average Value

D,R

NaN

Units of the extended attribute

Maximum Value

R

-INF

Units of the extended attribute

Minimum Value

R

INF

Units of the extended attribute

If any of the following three attributes are written or changed, all samples in the sampling buffer become invalid (set to zero, NaN, -INF, or INF), which makes them Undefined for the UI.

Attempted Samples

W

 

The only acceptable value that can be written to this property is zero using the Clear command.

Window Interval

C,W

3,600

Units = seconds

Range: 900–360,060

Window Samples

C,W

15

Range: 2–200

The following four attributes do not appear in a view, but may be scheduled, trended, and so on.

COV Increment

C,W

0.01

Any value > 0

Floating point value of the Display Precision.

Display Precision

C,W

100ths

Uses Display Precision (Set 0).

Reliability

 

Reliable

Uses Reliability (Set 503).

Units

 

No Units

Units of the extended attribute