105U-G Wireless Gateway
User Manual
Page 15
© September 2004
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.
The 105G also transmits periodic update messages if there has been no change - if an I/O
register is mapped to a remote output or another 105G, then that register can be configured
with an update time.
105G modules can transmit to 105G modules as well as other 105G modules. There can be
multiple 105G and 105C modules in a network - as well as 105U I/O. Because the 105U
protocol is peer-to-peer, there are few constraints on communications between multiple 105U
modules.
Poll Messages
A 105G can also generate poll messages to remote 105U modules. These poll messages act in
the same way as a start-up poll - the remote module immediately responds with update
messages for any I/O mappings configured to the 105G.
Poll messages can be triggered by:
•
time period, configurable 1 – 4096 sec (1.1 hour), or
•
real time clock, or
•
on demand by the host device, by writing to a “trigger register” in the 105G
1.3.2
105G to 105G Network
Different types of 105G modules can communicate - for example, a Modbus 105G can
communicate with an Ethernet 105G. I/O registers in one 105G can be transmitted to I/O
registers in another 105G. When the 105G is configured, “mappings” can be entered linking
I/O registers to registers in another 105G.
105U-G
105U-3
105U-1
105S-2
505U-K
105U-G
105U-3
105U-1
PLC
105U-C
PLC