BACnet Alarm Tab - Metasys - LIT-12011942 - "" - Software Application - Metasys Open Data Server - 10.1

Acked Transitions

B

To Offnormal, To Fault, To Normal

Applies to all point objects and the Accumulator.

Displays three states that independently indicate the receipt of acknowledgments for To Offnormal, To Fault, and To Normal events. Transitions to High Limit and Low Limit Event States are considered Offnormal events.

These states are set to False when the corresponding event occurs and an acknowledgment is expected as defined in the Notification Class Object referenced by the Notification Class attribute of this object.

The states are set to True upon receipt of the corresponding acknowledgment.

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.

Specifies the value (or list of values for multistate objects) that Present Value must reach before an event generates. If the object supports intrinsic reporting, this attribute is required.

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.

Defines the value by which the Present Value must change below the High Limit or above the Low Limit before the object generates a To Normal event.

Error Status

Applies to the BO object.

Indicates whether the Present Value was successfully written to the object defined by the Feedback Reference. The Error Status displays Ok if the object was able to send its latest Present Value to the feedback object. Otherwise, the Error Status displays the error of the first failed command.

Event Enable

C,W

B,W

To Offnormal, To Fault, To Normal

Applies to all point objects and the Accumulator.

Contains three states that independently enable To Offnormal, To Fault, and To Normal events. Transitions to High Limit and Low Limit Event States are considered Offnormal events. An unreliable condition generates a Fault event.

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.

Indicates the active alarm state of the Intrinsic Alarming feature if enabled for the object. In BACnet terms, High Limit and Low Limit states are Offnormal.

Event Time Stamps

B

BACnet formatted Time Stamps

Applies to all point objects and the Accumulator.

Indicates the times of occurrence of the last To Offnormal, To Fault, and To Normal event transitions. Time and Date time stamps are shown as * if no transition of that type has been generated. Sequence time stamps are 0 if no transition of that type has been generated. If intrinsic reporting is supported by the object, this attribute is required.

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.

Specifies any states the Present Value must equal before a To Fault event issues. If Present Value becomes equal to any of the states in the Fault Values list, and no physical fault is detected for any inputs represented by the Present Value attribute, then the Reliability attribute has the value Multistate Fault. If the object supports intrinsic reporting, the Fault Values attribute is required.

C,W

W

Applies to BO and MO objects.

Indicates the object reference of the feedback object.

Feedback Value

C,W

W

Inactive, Active

States Text attribute identifies the value set for this attribute.

Applies to BO and MO objects.

Indicates the status of a feedback value from which Present Value must differ before an event generates. The amount Present Value differs from Feedback Value to generate an event is locally determined. This attribute is required if the object supports intrinsic reporting.

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.

Indicates the graphic associated with the alarm extension.

Graphic Alias

C,W

C,W

Maximum 256 characters

Applies to all point objects and the Accumulator.

Indicates a portion of the graphic’s item reference, up to and including the name of the folder containing this object or the controller containing this point.

High Limit

C,W

B,W

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

Defines the high limit that the Present Value attribute must exceed before an event is generated.

The object generates a To Offnormal event when the Present Value exceeds the High Limit for a minimum period of time, defined in the Time Delay attribute; the High Limit Enable is True in the Limit Enable attribute; or the To Offnormal is True in the Event Enable attribute.

The object generates a To Normal event when the Present Value falls below the High Limit minus the Deadband for a minimum period of time, specified in the Time Delay attribute; the High Limit Enable flag is set in the Limit Enable attribute; or the To Normal flag is set in the Event Enable attribute.

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.

Specifies any states that the Present Value must equal before the point generates a To Offnormal event and enters the Life-Safety-Alarm event state.

Limit Enable

C,W

B,W

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

Contains two flags that independently enable and disable reporting of High Limit and Low Limit events and their return to Normal. This attribute is required if the object supports intrinsic reporting.

Low Limit

C,W

B,W

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

Defines the low limit that the Present Value attribute must fall before an event generates.

The object generates a To Offnormal event when the Present Value falls below the Low Limit for a minimum period of time, defined in the Time Delay attribute; the Low Limit Enable is True in the Limit Enable attribute; or the To Offnormal is True in the Event Enable attribute.

The object generates a To Normal event when the Present Value exceeds the Low Limit plus the Deadband for a minimum period of time, specified in the Time Delay attribute; the Low Limit Enable flag is set in the Limit Enable attribute; or the To Normal flag is set in the Event Enable attribute.

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.

Defines the notification class for handling and generating event notifications for the object. This attribute implicitly refers to the Notification Class Object that has a Notification Class attribute of the same value.

C,W

C,W

Set to Notification Class: 1

Applies to all point objects and the Accumulator.

Allows selection of a Notification Class object. When the Notification Object Reference is written, the value of the Notification Class attribute is updated to reflect the referenced object’s instance number. The value of the Notification Object Reference attribute is restricted to Notification Class objects on the same device as the Alarming object.

C,W

B,W

Alarm, Event

Applies to all point objects and the Accumulator.

Defines whether the transitions generated by the object are Events or Alarms.

Pulse Rate

C,W

Applies to the Accumulator object.

Indicates the number of input pulses received during the most recently completed period specified by the Limit Monitoring Interval. This value is monitored by the Intrinsic Alarming logic for this object. This attribute is writable only when the object is out of service.

Time Delay

C,W

B,W

0 to 65,535

Units = seconds

Applies to all point objects and the Accumulator.

Defines the minimum number of seconds that the Present Value must remain outside the range defined by the High Limit and Low Limit attributes before the object generates a To Offnormal event.

Also defines the minimum time the Present Value must remain within the range defined by the High Limit and Low Limit attributes, including the Deadband attribute value, before the object generates a To Normal event.

When used with the Feedback Value, this value specifies the minimum number of seconds that the Present Value must remain equal to the Feedback Value before a To Offnormal event generates or different from the Feedback Value before a To Normal event generates.

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.