BACnet Polarity Relationships - Metasys - LIT-12011964 - Software Application - System Configuration Tool - 13.2

Metasys SCT: System Configuration Tool Help

Brand
Metasys
Product name
System Configuration Tool
Document type
User Guide
Document number
LIT-12011964
Version
13.2
Revision date
2020-01-21
Language
English

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