Slot Communication Network Management - TR-Electronic 65 Serie Gesamt-Bedienungsanleitung

3.1.2 Slot Communication Network Management

EPL provides following functions:
1. Transmission of time-critical data in precise isochronous cycles. Data exchange
is based on the "Producer/Consumer" relationship. Isochronous data
communication can be used for the transmission of the position data of the
measuring system for example. The Producer (measuring system) corresponds
to the sender, which transmits its data only on request to the communication
partners, the Consumer (PLC), which processes the data.
2. Synchronization of networked nodes with high accuracy.
3. Transmit less time-critical data asynchronously on request. Data exchange is
based on the "Client/Server" principle. Asynchronous data communication can
be used to transfer IP-based protocols like UDP for example.
EPL manages the network traffic in a way that there are dedicated time-slots for
isochronous and asynchronous data. It takes care that always only one networked
device gains access to the network media. Thus transmission of isochronous and
asynchronous data will never interfere and precise communication timing is
guaranteed. The mechanism is called "Slot Communication Network Management"
(SCNM). SCNM is managed by one particular networked device – the "Managing
Node" (MN) – which includes Master functionality. All other nodes are called
"Controlled Nodes" (CN) and offer Slave functionality. The measuring system
corresponds to a Controlled Node.
Figure 1: Slot Communication Network Management, SCNM
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06/26/2017 TR - ECE - BA - DGB - 0071 - 05
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