Installation guide

120 Documenting the Network Layout
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4.3 Defining Your Node Requirements
Before you document your network layout, make a list of your
requirements for each node device. Include the node address, device
type, site location, application, setup parameters, and a summary of the
communications to be sent and received.
Include all the necessary setup parameters for each type of device. For
example, if the device is a controller, define its free-running timer
location to identify the registers that will be used for Modbus address
mapping. For a host-based network adapter, define its memory base
address and driver parameters. For a Bridge Multiplexer, define its
attached Modbus devices, Modbus port parameters, and Modbus
address mapping.
An example of a Node Planning Worksheet is shown in Figure 45. You
can adapt this worksheet to your requirements, adding other fields of
information as needed. If a node will have several applications, you
may want to use separate worksheets for showing the types of
communication that will be used in each application.
When you have defined each node’s requirements, use the network
worksheets in the rest of this chapter to document your network layout,
cable routing, and materials.