BACnet Polarity Relationships - Metasys - LIT-12011942 - "" - Software Application - Metasys Open Data Server

BACnet Polarity Relationships - Metasys - LIT-12011942 - "" - Software Application - Metasys Open Data Server - 10.1

Metasys Open Data Server Help

Product

Building Automation Systems > Databases and Data Servers > Metasys Open Data Server

Document type

User Guide

Document number

LIT-12011942

Version

10.1

Revision date

14/10/2019

The relationship between the Present Value of an object and the physical state of the object is determined by the Polarity attribute.

Note: The table below describes this relationship as defined by BACnet standards. Johnson Controls Polarity is always Normal. Johnson Controls does not support changes to the Polarity attribute.

Table 1. BACnet Polarity Relationships
Present Value	Polarity	Physical State of the Hardware Input	Physical State of the Monitored Device
Inactive	Normal	Off or Inactive	not running
Active	Normal	On or Active	running
Inactive	Reverse	On or Active	not running
Active	Reverse	Off or Inactive	running