Honeywell HC900 User Manual page 3

Abstract
This document provides information specific to the communications interface for Honeywell's HC900 Controller.
The protocol supported for connection to the controller's Ethernet network port is Modbus/TCP (Modbus RTU
protocol in a TCP/IP wrapper). . The document includes a summary of all HC900 data available (primarily floating
point) for Modbus RTU access read and write including methods for access.
Support & Contact Information
For Europe, Asia Pacific, North and South America contact details, refer to the back page of this manual
or the appropriate Honeywell Solution Support web site:
Honeywell Organization
Corporate
Honeywell Process Solutions
HPS Technical tips
Telephone and Email Contacts
Area
United States and
Canada
Global Email Support
Revision 13
April 2017
About This Document
Organization
Honeywell Inc.
Honeywell Process Solutions
HC900 Process Controller Communications User Guide
WWW Address (URL)
http://www.honeywell.com
http://www.hpsweb.honewell.com/ps
http://hpsweb.honeywell.com/Cultures/en-
US/Products/Instrumentation/hybrid/hc900/TechnicalTips
/documents.htm
Phone Number
1-800-343-0228 Customer Service
1-800-423-9883 Global Technical Support
Email: (Sales)
FP-Sales-Apps@Honeywell.com
or (TAC)
hfs-tac-support@honeywell.com
iii