Honeywell HC900 - Manual (Page 3)

Revision 10 HC900 Hybrid Controller Communications User Guide iii
12/07
About This Document
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.
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IM&C Technical tips http://content.honeywell.com/ipc/faq
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