Definition Of Network Systems; Communication Protocol Standards; Hierarchical Structure Of The Communication Protocols - Sharp JW-20FL5 User Manual

Chapter 15: Appendix

15-3 Definition of network systems

[1] Communication protocol standards

The term "Communication protocol" refers to the rules for exchanging information between systems on
a particular communication circuit. The communication protocols used by FL-net conform to the follow-
ing standards.
FL-net communication protocols
FL-net supported
communication protocol
FL-net
UDP
IP, ICMP etc.
APR etc.
Ethernet

[2] Hierarchical structure of the communication protocols

The communication protocols are configured as a layered structure. Communication processes are
expressed and standardized by classification and they are arranged in various levels. The FL-net con-
sists of the following six protocol layers.
Application layer
FA link protocol layer
Transport layer
Network layer
Data link layer
Physical layer
15
Compatible specifications
FA link protocol specification sheets
(MSTC FA open promotion committee, issued by the
FA control network promotion committee)
RFC768
RFC791, 792, 919, 922, 950
RFC826, 894
IEEE802.3
Controller interface
Cyclic transfer
Token function
Ethernet
(Compatible with IEEE802.3)
Hierarchical structure of the FA link protocol
15-12
Service function
Message transfer
UDP
IP
FL-net
protocol