Honeywell HC900 - Manual (Page 9)

Introduction
Overview
Revision 10 HC900 Hybrid Controller Communications User Guide 1
12/07
1. Introduction
1.1 Overview
Communication interfaces
The HC900 controller provides Modbus communication support on three communication interfaces.
• Network port: Modbus TCP on an Ethernet connection
• Serial Port S1 RS232/RS485 selectable port. (Default RS232.): Modbus RTU
• Serial Port S2 RS232/RS485 selectable port. (Default RS485.): Modbus RTU
View or print addresses
You can print out the Modbus addresses of various parameters of the configuration (signal tags, PID loops,
SP programmer, etc.) using the HC Designer report functions. With HC Designer Ver. 2.1 and later, these
reports may also be exported to .csv files for view/manipulation in a spreadsheet and possible import to
other HMI applications.
Fixed map or custom map
The type of addressing available: fixed or custom.
Fixed map Custom map
Contains limited types of parameters in limited
quantities (e.g., 32 loops max) More parameters to choose from. Quantities are limited
only by available addresses. (e.g.,can have >32 loops.)
Certain blocks can be assigned to the custom map that
are not available in the fixed map. (See section 6.18.)
Objects of each type (e.g. loops 1-24, SP
Programmers 1-4, etc.) are grouped and limited to
certain address ranges. Objects (e.g. loop) can be assigned any address or to
multiple addresses and are not limited to certain ranges.
All parameters of a single object are addressed. For
example, a PID loop has over 40 parameters and they
all are mapped. You can select which parameters of an object are
mapped. For example, you can assign only 3 of a loop’s
40+ parameters to the map (such as PV, SP, output),
thereby increasing efficiency.
Editing is limited to
-moving an object to another address within its allowed
range.
-assigning up to 1000 signals and variables to
addresses reserved for that purpose.
Edits are virtually unlimited. Uses fixed map settings but
can be edited or rebuilt as needed without the fixed
map’s limitations. Custom partitions can be created for
organizing data however you prefer.
Available in all HC900 configuration versions Available in HC900 configuration version 4.0 and higher
1.2 Modbus/TCP Interface
Introduction
HC900 controllers support the Modbus/TCP (also called Modbus TCP/IP or Modbus Ethernet) protocol for
communications with third party HMI and SCADA software via a direct Ethernet TCP/IP connection.