WI-GTWY-9-xxx Wireless Gateway
Introduction v1.18
16
WI-I/O 9-x modules can transmit input messages directly to outputs on other WI-I/O 9-x module,
as well as the WI-GTWY-9-xxx. The same input can be transmitted to different addresses by
entering two "mapping" configurations at the remote module.
Normal WI-I/O 9-x Messages
I/O registers in a WI-GTWY-9-xxx can be configured (mapped) to outputs at remote WI-I/O 9-x
modules, or I/O registers in WI-GTWY-9-xxx modules. The WI-GTWY-9-xxx 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 WI-GTWY-9-xxx also transmits
periodic update messages if there has
been no change - if an I/O register is
mapped to a remote output or another
WI-GTWY-9-xxx, then that register can be configured with an update time.
WI-GTWY-9-xxx modules can transmit to WI-GTWY-9-xxx modules as well as other WI-
GTWY-9-xxx modules. There can be multiple WI-GTWY-9-xxx modules in a network - as well
as WI-I/O 9-x I/O. Because the WI-I/O 9-x protocol is peer-to-peer, there are few constraints on
communications between multiple WI-I/O 9-x modules.
Poll Messages
A WI-GTWY-9-xxx can also generate poll messages to remote WI-I/O 9-x 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 WI-GTWY-9-xxx.
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 WI-GTWY-9-xxx
1.3.2
WI-GTWY-9-xxx to WI-GTWY-9-xxx Network
Different types of WI-GTWY-9-xxx modules can communicate - for example, a Modbus WI-
GTWY-9-xxx can communicate with an Ethernet WI-GTWY-9-xxx. I/O registers in one WI-
GTWY-9-xxx can be transmitted to I/O registers in another WI-GTWY-9-xxx. When the WI-
GTWY-9-xxx is configured, “mappings” can be entered linking I/O registers to registers in
another WI-GTWY-9-xxx.
As well as the normal “I/O change” messages and update messages, the WI-GTWY-9-xxx has
“block read” and “block write” messages for use with other WI-GTWY-9-xxx modules. These
messages will transmit multiple register values instead of only one as in the normal WI-I/O 9-x
message. The block read/write messages increase the efficiency of radio communications where a
WI-GTWY
WI-I/O 9
WI-I/O
PLC
WI-GTWY
PLC
