Event totalization - Metasys - LIT-12012116 - Server - Metasys UI - 7.0

Johnson Controls System Configuration Tool (JCT) Help
Product
Building Automation Systems > Graphics and Interfaces > Metasys UI
Document type
User Guide
Document number
LIT-12012116
Version
7.0
Revision date
2024-09-25

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.