Weidmuller WI-I/O-9-U2: Wireless Mesh I/O & Gateway User Manual V1.2.2 - Manual (Page 14)

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The WI-I/O 9-U2 modules transmit the input/output data using radio or Ethernet. The
data frame includes the "address" of the transmitting module and the receiving module,
so that each transmitted message is acted on only by the correct receiving unit. Each
message includes error checking to ensure that no corruption of the data frame has
occurred due to noise or interference. The module with the correct receiving "address"
will acknowledge the message with a return transmission (acknowledgement). If the
original module does not receive a correct acknowledgement, it will retry up to 5 times
before setting the communications fail status of that message. For critical messages,
this status can be reflected on an output on the module for alert purposes. The module
will continue to try to establish communications and retry, each time an update or
change-of-state occurs.
A system can be a complex network or a simple pair of modules. An easy-to-use
configuration procedure allows the user to specify any output destination for each input.
The WI-I/O 9-U2 comes from the factory with WEIDMULLER WibMesh protocol as
standard. This protocol provides enhanced features, including IP addressing, allowing
thousands of modules to exist in a system, and allowing automatic routing of messages
through repeater stations.
The module can also be configured with the Legacy WibNet protocol which provides
operation with existing WEIDMULLER wireless I/O devices (WI-I/O 9-X series and 105
series 869MHz modules).
The module can easily be switched between the two versions by selecting the
appropriate protocol from an inbuilt web page.
Each WI-I/O 9-U2 radio can have up to 24 expansion I/O modules (WEIDMULLER WI-
I/O-EX-1-S) connected by RS485 twisted pair cable. Any input signal at any module
may be configured to appear at any output on any module in the entire system.
Modules can be used as repeaters to re-transmit messages on to the destination
module. Repeaters can repeat messages on the radio channel or from the radio
channel to the serial channel (and serial to radio). The meshing protocol will
automatically select other stations to act as repeaters if required (up to ten hops). Using
Legacy protocol, up to five repeater addresses may be configured for each input-to-
output link.
The units are configured using Configuration software via Ethernet or USB or by
accessing the internal webpages using a web browser. The software configuration is
detailed in Chapter 4 - Configuration.
For web based configuration consult separate Web Page configuration Supplement.