Event totalization - Metasys - LIT-12011953 - Server - Metasys UI

Event totalization - Metasys - LIT-12011953 - Server - Metasys UI - 7.0.50

Metasys UI Help

Product

Building Automation Systems > Graphics and Interfaces > Metasys UI

Document type

User Guide

Document number

LIT-12011953

Version

7.0.50

Revision date

2024-03-19

Product status

Active

The Event totalization extension tracks the number of binary events or pulses over time, meaning it counts the number of transitions that occur at an input reference. Unlike other types of totalization, event totalization increases the value each time the event occurs, instead of calculating the value once each minute.

These three essential parameters determine the mode of operation for the Event totalization extension:

the monitored Input Reference
the types of recorded Transitions or events
the recorded Value Per Pulse (event)

You can use this extension to determine the number of changes in an input value, which may be helpful for maintaining and monitoring equipment. For example, use Event Totalization to determine how many times a motor started, how often a sensor was in alarm, or how many cars entered a parking lot.

The Event totalization extension contains attributes common to Metasys system objects. The following table lists the attributes specific to the Event totalization extension.

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

Table 1. Event totalization attributes
Attribute name	Notes	Initial value	Values/Options/Range	Description
Display Precision	C,W	1s	Uses Display Precision (Set 0).	Indicates the rounded position and the number of decimal places to display for this extension.
Executing		Active	Active Totalize Limit Inactive	Reflects the status of this extension. Active: The extension is calculating and has not reached the Totalize Limit. Totalize Limit: The extension has reached the limit and has stopped calculating because Rollover is set to False. Inactive: The extension is unreliable or disabled and is not calculating.
Input Reference	C			Specifies the object and attribute totalized by this extension. If this attribute is unreliable, totalization is temporarily suspended.
Present Value	C,D,R,W			Represents the current value of the extension.
Reference	C,W	State 0	States Text attribute identifies the enumeration set for this attribute.	Defines the value that the extension processes for totalization, as defined in the Input Reference attribute.
Reliability		Reliable	Uses Reliability (Set 503).	Represents the reliability of the Present Value. If the Input Reference becomes unreliable, the totalization extension monitoring the input becomes unreliable.
Reset (This attribute does not appear in a view, but may be scheduled and trended.)	W	False	False True	Forces the extension into a reset condition. (Terminates any ongoing calculations, restores the Present Value to initial state, and, for each triggerable attribute, forces a COV report.) This attribute does not appear in a view, but may be scheduled, trended, and so on.
Reset Date				Represents the date of the last Reset condition of the extension.
Reset Time				Represents the time of the last Reset condition of the extension.
Rollover	C,W	False	False True	Defines the special action that the totalization extension takes when the Present Value reaches the Totalize Limit value. If the Rollover attribute is set to False, the Runtime Totalization extension ceases further operation when the Present Value equals or exceeds the Totalize Limit value. If the attribute is set to True, it resets the present Value to 0.0 and resume a new cycle of totalization.
Rollover Count	R,W	0	0–4,294,967,295	When the Rollover attribute is True, this value increases each time Present Value reaches a value equal to or greater than the Totalize Limit value.
Scale Factor	C,W	1.0	Minimum Value > 0	Indicates the value that is used to scale the totalized value to either a larger or smaller value than would otherwise result.
States Text (This attribute does not appear in a view, but may be scheduled and trended.)	C,W	States		Indicates the displayed strings for the Present Value. This attribute does not appear in a view, but may be scheduled, trended, and so on.
Totalize Limit	C,N,W			Defines a threshold value that the Present Value must meet or exceed for the totalization extension to take special action. When the Rollover attribute is set to False, the totalization process ceases further operation. When it is set to True, Present Value is cleared to 0, and the totalization process starts over.
Transition	C,W	Entering State	Entering State Count All	Describes the behaviors of the transitions to be counted. If the value is 0, the system counts the transition of entering a given reference. If the value is 1, the system counts all state transitions.
Units	C,W		IP SI	Indicates the measurement units of this extension. IP=Imperial units; SI=International System of Units.
Value Before Reset				Indicates the value of the Present Value at the time of the last reset operation.
Value Per Pulse	C,W	1		Indicates the unit value of the Input Reference for pulse totalization. For the event totalization, the value is 1.