User manual

Chapter 1 Introduction
Page 15 ©February 2009
1.3 The Wireless Network
The 105G can communicate with up to 490 other addresses - this could be 490 other 105U
modules, or in the case of 505K modules, it could be many thousands of modules (as many 505K
modules can share the same address). 105G modules may take up more than one address under
some circumstances.
Any 105G or 105U module can act as a radio repeater for other modules - that is, radio messages
can be passed onto other modules. Up to five repeater addresses can be configured for messages
transmitted to a 105G module.
Each module can have a unit address between 1 – 95, but the 105G also recognizes repeater
addresses in conjunction with the unit address as the module “identifier”. Hence module #2 is
recognized as different to #2 via #57 - #57 being a repeater.
1.3.1 105U to 105G Network
In the wireless I/O system, the 105G acts as a normal 105U module (this covers 105U I/O, 105S
I/O, 505K and 105U-C modules).
105U modules transmit messages to the 105G
address and the 105G acknowledges these
messages like a normal 105U module. When a
105G transmits messages to change remote
outputs, it will "re-try" if it does not receive an
acknowledgment, like a normal 105U module.
Remote 105U modules can connect to 105S
modules in the normal way. The 105G host can
access I/O on 105S modules by using the
intermediate 105U as a repeater.
105U modules can transmit input messages directly to outputs on other 105U module, as well as
the 105G. The same input can be transmitted to different addresses by entering two "mapping"
configurations at the remote module.
Normal 105U Messages
I/O registers in a 105G can be configured
(mapped) to outputs at remote 105U
modules, or I/O registers in 105G modules.
The 105G will transmit an I/O message
when a “change-of-state” occurs for that
I/O register. Registers have a configurable
“sensitivity” value - this determines how
much the register value has to change to
trigger a change message. A change-of-
state occurs when the register value has
changed by more than the sensitivity value since the last transmission.
105G
105U-3
105U-1
PLC
105U-C
PLC
105G
105U-3
Expansion I/O
105U-1
505K