105 Radio/Serial Telemetry Module
User Manual
Page
34
©
January 2004
Chapter Four
CONFIGURATION
4.1
Introduction
The 105 modules are configured by connecting a computer (PC) using the 105 Configuration
Software programme. The same software program is used to configure 105U-C and 105U-G
modules - for more information, refer to the separate User Manuals.
Each 105 module is configured with a system address and a unit address. The system address
is common to every module in the same system, and is used to prevent "cross-talk" between
modules in different systems. Separate networks with different system addresses may operate
independently in the same area without affecting each other. The system address may be any
number between 1 and 32 767. The actual value of the system address is not important,
provided all modules in the same system have the same system address value.
A system
address of zero should not be used.
The configuration program automatically offers a
random number for the system address - you can change this to any number in the valid
range but we recommend that you use the random number.
Each module must have a unique unit address within the one system. A valid unit address is
1 to 127. A network may have up to 95 individual modules communicating via radio (unit
addresses 1 to 95), each with up to 31 modules communicating via RS485 (unit addresses 96
to 127). In the network, any individual input signal may be "mapped" to one or more outputs
anywhere in the system. The unit address determines the method of communication to a
module. Any module with a unit address between 96 and 127 will communicate by RS485
only. Other units with a unit address below 95 may communicate by radio
or
RS485 - the
unit will determine which way to communicate depending upon the unit address of the
destination module. For example, Unit 31 will talk to Unit 97 by RS485 only, but will talk to
unit 59 by radio only. 105S units must always have a unit address between 96 and 127 as
serial communication is the only method of communication available.
A unit address of
zero should not be used.
The four different products in the range can be used together in the same system, as well as
105U-C and -G modules. Inputs to one product type can be transmitted to outputs of another
product type. For example, an analogue input to a 105-2 may be transmitted to an analogue
output of a 105-1 or 105-3. Repeaters may be any product type.
The 105-1 and 105-2 modules require only one unit address. The 105-3 and 105-4 modules
use two addresses, however only one unit address has to be entered. The 105-3 and 105-4
modules require two addresses because of the large number of output channels. If the
“entered" unit address is an even number, then the second address is the next number. If the
"entered" address is an odd number, then the second address is the previous number. So the
two addresses are two subsequent numbers, starting with an even number. If a 105-3 module
is given a unit address of 10, then it will also take up the unit address 11 and will accept
messages addressed to either 10 or 11. It is important to remember this when allocating unit
addresses to other modules in the system.
Warning - do not allocate the address number 1 to a 105-3 or 105-4.
