Clipsal C-Bus Spécifications télécharger pdf (Page 41)

1B. C-Bus Concepts

2.0 C-Bus Addressing Conventions

Several types of addresses are used when communicating with C-Bus units.

2.1 Network Address

A C-Bus network is a collection of C-Bus devices connected together using Cat-5 UTP LAN cable.

The network size is dependent on various factors such as:

• the Cat-5 cable length

• the number of units per network

• the total current drawn on the Cat-5 cable.

The Network Address is a code assigned to each network within a particular project. A Network

Address can be any value between 000 and 254. A C-Bus network defaults to a Network

Address of 254.

Network Addresses are really only of concern when multiple networks are used.

2.2 Unit Address

All units on a C-Bus network have a unique identity code called a Unit Address. This code is used in

messages sent over the bus, to ensure that only the appropriate unit responds. Such messages are

typically used to program C-Bus operating variables.

The unique Unit Address allows:

• each unit to be individually programmed and customised, without removing it from the network

• instructional messages to be passed over the network to specic units.

A Unit Address ranges from 000 to 255, however 255 is reserved as a default for new units which

have not been assigned a unique Unit Address.

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Clipsal C-Bus Spécifications Page 41