Ethernet Open Connectivity Network - Honeywell HC900 Installation And User Manual

Components and Architecture - Ethernet Open Connectivity Network
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Physically assigning Rack Numbers, by positioning jumpers or DIP switches in the Scanner Module for
each rack.
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Placing the appropriate module type in each slot in each rack.
The I/O expansion network uses Honeywell private protocol that optimizes I/O performance and security.
The configuration and operation of the I/O expansion network is automatic, it is entirely under control of
built-in private software that resides in the Controller Module and in each Scanner Module included in the
HC900 system. The controller examines the control strategy stored in its memory, verifies that the physical
configuration (Rack Numbers, and I/O Module type- by Module Number) matches the stored control
strategy, and establishes communication with each of the I/O modules in each of the I/O racks.
I/O Expansion Network (C75)
I/O for redundant controllers is the same as I/O Expansion Network page 28, with the following
exceptions/notes.
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In Figure 18, any of the racks shown in each controller configuration can be 4-, 8- or 12-slot versions.
Redundant I/O power not available with 4-slot.
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I/O ports are 100 Base-T instead of 10Base-T.
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Maximum of 2 switches between each CPU (CPU A and CPU B) and the I/O racks.

Ethernet Open Connectivity Network

The configuration of the Ethernet Open Connectivity Network varies with specific applications in purpose
and in complexity. In some applications, configuration is straightforward and within the capabilities of
experienced installation technicians. In other applications (for example, those that include inter-connection
to other networks such as Intranet and Internet), a working knowledge of networking is required.
The Ethernet Open Connectivity Network for a given HC900 Controller enables:
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Redundant Networks.
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Peer-to-peer communication
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Connection to other PC hosts
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Inter-connection to other networks (such as for sending Alarm/Event messages via e-mail.)
CAUTION
Communications lockout is possible in high network traffic conditions.
Extraneous traffic is possible when sharing bandwidth with other devices. We recommend putting the
controller on a private network segment. Failure to do so could, in high traffic cases, result in
communications lockout requiring the controller to be power-cycled.
Redundant Networks
Honeywell OPC Server supports redundant networks. Up to 10 connections may be distributed in any
combination across the controller's 2 network ports (E1 and E2). PC hosts may include, for example, HMI
supervisory software and/or Designer Software configuration software. Redundant ports may be used in a
simplex mode (non-redundant).
Revision 19
06/14
HC900 Process Controller Installation and User Guide 29