Omron CJ1W-FLN22, Operation Manual, Page: 228 / 277

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Network System Definitions Appendix C
The FL-net data for a single frame that can be monitored on the communications line is shown in the following
diagram. In this example, 128 bytes of cyclic data is being transferred.
FL-net Header Format
The FL-net header consists of between 64 and 96 bytes.
The FL-net header is added at the beginning of all frames in the FL-net protocol.
ADDR HEX ASCII
FF FF FF FF FF FF 08 00 19 10 00 07 08 00 45 00 0000 ..............E.
00 E4 EB 59 00 00 80 11 D8 52 C0 A8 FA 0B C0 A8 0010 ...Y.....R.......
FA FF D6 DB D6 D8 00 D0 00 00 46 41 43 4E 00 00 0020 ..........FACN..
00 C8 00 01 00 0B 00 02 00 01 00 07 07 00 00 00 0030 ................
00 00 01 00 00 00 80 00 00 00 00 00 00 00 0A 00 0040 ................
00 00 FD E8 00 00 00 28 00 04 02 80 00 40 00 00 0050 .......(.....@..
80 00 01 01 00 C8 61 32 00 02 5B 91 00 00 00 00 0060 ......a2..[.....
00 00 5B 91 00 00 00 00 00 00 00 00 00 00 00 00 0070 ..[.............
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0080 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0090 .................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00A0 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00B0 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00C0 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00D0 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00E0 ................
00 00 00F0 ..
Ethernet header
UDP header FL-net header
IP header
User data
64 to 96 bytes
1,024 bytes max.
FL-net header
Cyclic/message data
FA link data
Lower layer header
1,500 bytes max.