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Introduction
Modbus/TCP Interface
Revision 4 HC900 Hybrid Controller Communications User Guide 3
9/03
Subnet Mask (if other than default, 255.255.255.0), and Default Gateway IP address (if required,
otherwise leave at default 0.0.0.0). See your IT network administrator for proper entries. (Refer to
the on-line help provided with the HC Designer software, Utilities Worksheet, Set Controller’s
Network Parameters, for further details on this step).
Note: This setup will require the controller to be placed temporarily in the Program mode. After the new
network parameters have been downloaded, the controller will conduct a Cold Start in its transition to RUN.
This will cause an initialization if there is a current configuration in the controller.
The fixed IP address of each controller shall be set independently prior to placing on the network. See your IT
systems administrator for allocating IP addresses, subnet masks, or default gateway IP address as necessary
(network address filtering and routing may be necessary if the controller network access will not to be confined
locally within the plant environment).