User`s manual

Maxiflex T2 CPU User Manual 32 -© Omniflex
UMM124XBR04.pdf
1. Only one message is required on the network for a data update as opposed to two in a
Request/Reply polling method. This reduces network overhead allowing more data
throughput on the network.
2. The regular data updates can be much slower than the response time required for the
system by using change-of-state detection. The Source node will send data
immediately there is a change of state, providing the optimum system response,
without the need to have a fast regular update time. This reduces network overhead
allowing more/faster data throughput on the network when something does change.
3. On peer-to-peer networks multiple subscriptions can be configured between nodes in
different directions, each of which would operate independently of any other. This
provides far more flexibility than typical Poll/Response Master/Slave methods.
Data
Sink
Data
Source
Subscription
Setup
Registers
Setup Message
Regular Data updates
The Receiving
Node
The Sending
Node
The node acting as a data “source” (the sending node) requires no user configuration to
participate in a subscription contract with another node. The node acting as data “sink” (the
receiving node) is configured by the user for the required data. The “sink” node then
automatically manages the subscription including sending the requests to the data source,
and managing errors in the process.