User Manual

20-COMM-H RS-485 HVAC Adapter User Manual
Publication 20COMM-UM009D-EN-P
Summary of Changes
The information below summarizes the changes made to this manual since
its last release (March 2004):
Description of Changes Page
Reformatted document from half size (5.5 x 8.5 in.) to full size (8.5 x 11 in.) Throughout
manual
Added SMC Flex to the list of compatible products, and Metasys N2 is compatible with
PowerFlex 700VC drive.
1-2
Added new Adapter Modbus Register Map section. 4-2
Included information about using Modbus RTU mode to access 16-bit and 32-bit
parameters.
4-10 and
4-12
Added new Adapter Parameter Direct Access section. 4-13
Added new Metasys N2 Device Identity subsection. 5-1
Added new “Reference Setup Examples” subsection. 5-4
Added tip about configuring Analog Data Integers (ADIs). 5-9
Added Flashing Red/Green MOD status indicator information. 8-3
Added new Parameter 32 - [RTU Param Mode] to select the 16-bit default mode or
optional 32-bit mode in which the adapter operates.
B-4