Yaskawa JAPMC-MC2303-E - Manual (Page 155)

Appendix A Network System Definition
A.8 FL-net Data Format
A-5
App
Appendices
A.8 FL-net Data Format
( 1 ) Overview of FL-net Data Format
Data to be transferred via FL-net is encapsulated in each layer of the communication protocol as shown in the follow-
ing figure.
Next, the following shows FL-net data (of one frame) that can be observed on communication lines. In this example,
128-byte cyclic data is transferred.
Ether header IP header UDP header Trailer FL-net data
IP header UDP header FL-net data
UDP header
UDP header
FL-net data
User data
User data
1,024 bytes
UDP segment
IP datagram
Ethernet frame
14 20 8
0000
0010
0020
0030
0040
0050
0060
0070
0080
0090
00A0
00B0
00C0
00D0
00E0
00F0
ADDR HEX
FL- net header
U ser data
IP header
Ether net header
U D P header
FF
00
FA
00
00
00
80
00
00
00
00
00
00
00
00
00
FF
59
DB
01
00
E8
01
91
00
00
00
00
00
00
00
00
A8
00
00
00
00
00
00
00
00
00
00
00
00
00
45
C0
00
00
0A
00
00
00
00
00
00
00
00
00
00
00
0B
4E
00
00
40
00
00
00
00
00
00
00
00
00
08
FA
43
07
00
00
00
00
00
00
00
00
00
00
00
07
A8
41
07
00
80
91
00
00
00
00
00
00
00
00
00
C0
46
00
00
02
5B
00
00
00
00
00
00
00
00
10
52
00
01
00
04
02
00
00
00
00
00
00
00
00
19
DB
00
00
00
00
00
00
00
00
00
00
00
00
00
00
11
D0
01
00
28
32
00
00
00
00
00
00
00
00
08
80
00
00
80
00
61
00
00
00
00
00
00
00
00
FF
00
D8
0B
00
00
C8
00
00
00
00
00
00
00
00
FF
00
D6
00
00
00
00
00
00
00
00
00
00
00
00
FF
EB
D6
00
01
FD
01
5B
00
00
00
00
00
00
00
FF
E4
FF
C8
00
00
00
00
00
00
00
00
00
00
00
00