Jetter JC-120MC, User Manual

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222 Jetter AG
10 Programming
10.3 Jetter Ethernet system bus
The Jetter Ethernet system bus has been designed for data exchange
between the following devices via standard Ethernet.
 Programming unit

Controllers
 Bus nodes
 Communication modules
The Jetter Ethernet system bus makes a difference between cyclic (implicit)
and acyclic (explicit) data interchange between communication participants.
Both kinds of data interchange can be executed simultaneously within a
network.
Data exchange Properties
Cyclic (implicit)

Architecture:
Publish/subscribe

Participants: Controllers, bus nodes and
communication modules

Access: Automatically by OS

Access time: Fast, deterministic

Data: Registers, inputs/outputs

Configuration: Hardware Manager in JetSym

Reach:
Subnet
Acyclic (explicit)

Architecture:
Client/server

Client: PC and controllers

Server:
PC, controllers, bus nodes and
communication modules

Data: E.g. registers, inputs/outputs, STX
variables, application program

Access: PC or application program

Access time: Depending on the reaction time of
the server

Configuration: Only when using network
registers

Reach:
International
Introduction
Data interchange