BACnet Alarm Tab - 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

Attributes associated with the BACnet Intrinsic Alarming for an object are shown under the BACnet Alarm tab of the display panel. This tab appears when the site is defined as a BACnet site and the object has intrinsic alarming enabled (that is, Intrinsic Alarming Defined set to True).

Note: In the notes columns, attributes marked with the letter C are configurable, and attributes marked with the letter W are writable. In the BACnet notes column, attributes marked with the letter B are exposed as a standard BACnet property. For more information about attribute characteristics, see Attributes.
Table 1. BACnet Alarm Tab Attributes

Attribute Name

Notes

BACnet Notes

Values/Options/Range

Description

Acked Transitions

 

B

To Offnormal, To Fault, To Normal

Applies to all point objects and the Accumulator.

Alarm Message Text

W

W

Maximum 256 characters

Applies to all point objects and the Accumulator.

Specifies the body of the user-defined alarm message. Starting at Release 10.0, this attribute is replaced by Event Message Texts Config. The value of this attribute is kept in sync with the first element of the Event Message Texts Config attribute. Any modification to either one changes the other. Also, for upgraded systems that use Alarm Message Text, any text in this field is moved to the first element of the Event Message Texts Config field.

Alarm Values

C,W

W

Inactive, Active

States Text attribute identifies the value set for this attribute.

Applies to BI, BV, MI, and MV objects.

For MI and MV objects, you can select multiple values from a list, unlike the other objects that are limited to one value.

To Offnormal event generates under these conditions:

– Present Value maintains the value(s) specified by Alarm Value(s) for a minimum period of time, specified in the Time Delay attribute.

– To Offnormal flag is enabled in the Event Enable attribute.

Once equal to the Alarm Value(s), the Present Value must become not equal to Alarm Value(s) before a To Normal event is generated under these conditions:

– Present Value remains not equal to the Alarm Value(s) for a minimum period of time, specified by the Time Delay attribute.

– To Normal flag is enabled in the Event Enable attribute.

BACnet Deadband

C,W

B,W

Applies to AI, AO, and AV objects.

Error Status

   

Applies to the BO object.

Event Enable

C,W

B,W

To Offnormal, To Fault, To Normal

Applies to all point objects and the Accumulator.

Event Message Texts

C, W

To Offnormal, To Fault, To Normal

Applies to all point objects and the Accumulator.

An array of three character strings that holds the message texts that identify the last state of the object. The states in sequential order are: TO_OFF_NORMAL, TO_FAULT, and TO_NORMAL. If a particular event is yet to occur, the respective entry in the array is blank (null).

Event Message Texts Config

C, W

To Offnormal, To Fault, To Normal

Applies to all point objects and the Accumulator.

An array of three character strings that defines the message texts used to identify the last state of the object. The states in sequential order are: TO_OFF_NORMAL, TO_FAULT, and TO_NORMAL, which you may customize by entering text in each field. What you enter here appears in the Event Message Texts attribute array. Starting at Release 10.0, this attribute replaces Alarm Message Text, but the two attributes are kept in sync so that any modification to either one changes the other.

Event State

 

B

Normal, Fault (unreliable), High Limit, Low Limit

Applies to all point objects and the Accumulator.

Event Time Stamps

 

B

BACnet formatted Time Stamps

Applies to all point objects and the Accumulator.

Fault Values

C,W

W

Numbers: 0 to 65,535

States Text attribute identifies the value set for this attribute.

The list of numbers come from a list of the Alarm Values.

Applies to MI and MV objects.

Feedback Reference

C,W

W

Applies to BO and MO objects.

Feedback Value

C,W

W

Inactive, Active

States Text attribute identifies the value set for this attribute.

Applies to BO and MO objects.

A To Offnormal event generates under these conditions:

– Present Value differs from the Feedback Value for a minimum period of time, specified in Time Delay.

– Event Enable attribute enables the To Offnormal flag.

Once equal to the Feedback Value, the Present Value must become different from the Feedback Value before a To Normal event generates under these conditions:

– Present Value remains not equal to the Feedback Value for a minimum period of time, specified by Time Delay.

– Event Enable attribute enables the To Normal flag.

Graphic

C,W

C,W

Applies to all point objects and the Accumulator.

Graphic Alias

C,W

C,W

Maximum 256 characters

Applies to all point objects and the Accumulator.

High Limit

C,W

B,W

Applies to AI, AO, AV, and Accumulator objects.

For the Accumulator object, this attribute indicates the upper limit of the Pulse Rate range.

Life Safety Alarm Values

   

Uses BAC LifSfty State (BACnet Lifesafety State) (Set 186).

Applies only to Life Safety Zone and Life Safety Point objects.

Limit Enable

C,W

B,W

Applies to AI, AO, AV, and Accumulator objects.

Low Limit

C,W

B,W

Applies to AI, AO, AV, and Accumulator objects.

For the Accumulator object, this attribute indicates the lower limit of the Pulse Rate range.

Notification Class

C,W

B,W

0 to 4,294,967,295

This is the BACnet Object Identifier of the Notification Class Object used for routing.

Applies to all point objects and the Accumulator.

Notification Object Reference

C,W

C,W

Set to Notification Class: 1

Applies to all point objects and the Accumulator.

Notify Type

C,W

B,W

Alarm, Event

Applies to all point objects and the Accumulator.

Pulse Rate

C,W

 

Applies to the Accumulator object.

Time Delay

C,W

B,W

0 to 65,535

Units = seconds

Applies to all point objects and the Accumulator.

For the Accumulator object, this value defines the minimum number of seconds that the Pulse Rate must remain outside of the range defined by the High Limit and Low Limit attributes before the object generates an event or alarm.