Fl-Net; Description Of The Fl-Net - Sharp JW-20FL5 User Manual

Fl-net module (board)
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Chapter 7: Computer Link Function

7-2 FL-net

[1] Description of the FL-net

(1) The FL-net concept
FL-net is an FA control network that uses an Ethernet protocol.
FL-net has a cyclic transfer function and a message transfer function.
The basic concepts of the FL-net are as follows.
1 Ethernet protocols are used for communication (physically and as conceptual data links)
between FA controllers.
2 A UDP/IP scheme compatible with the Ethernet is used. It establishes the basic data transfer
procedures.
3 While using the basic data transfer methods above, FL-net guarantees data transfer within a
specified time by managing and controlling (preventing conflicts) the access to communications
by each node in the network.
The goal of the FL-net is to control devices such as programmable controllers (PC), robot controllers
(RC), numeric control devices (CNC), and establish an FA control network that allows the exchange of
data between personal computers.
The figure below shows the conceptual arrangement of the FL-net.
7
EWS
Image Robot
controller
Personal
Personal
Personal
computer
computer
computer
Information network (Ethernet)
Gateway
FL-net
PC
Nut
Printer BCR
NC
runner
Field network
Note: BCR; Bar Code Reader, ID: ID controller
The FL-net concept
Server
ID Graphic
Personal
computer
Sensor
actuator
7-6
panel

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