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MELSEC-F
5 COMMUNICATION PROCEDURE
Open status
Open allowed status
Closed status
Initial normal completion
BFM#27=0001H
OPEN/ CLOSE instruction
status (BFM#1602)
Open completion signal
(BFM#20480)
Power-on
1) Parameter update
completed
2)
3)
4)
5)
7)
8)
FIN
SYN
SYN+ACK
Open request signal
CLOSE
status
0000H
OPEN
processing
0003H
CLOSE
processing
0009H
CLOSE
status
0000H
FIN+ACK
Hub connected signal
BFM #28b7
(BFM#20482)
OPEN
instruction
W0001H
OPEN status
0005H
(OPEN failure
0010H)
CLOSE
instruction
W8000H
Hub connected
6)
1) After communicating the parameter settings, confirm the normal
completion of the Ethernet module initial processing.
(Initial completion signal BFM#27 "0001
H
")
2) Confirm that the Ethernet module and hub are connected. (BFM#28
b7:ON)
3) Start the open processing writing with pulse execution instruction
0001
H
to BFM#1602.
4) The Ethernet module executes the open processing.
• Sends the open request (SYN).
5) When the open processing completes normally
• Open completion signal BFM#20480 b0 : ON
• BFM#1602 "0005
H
"
Data communication is enabled.
When the open processing completes abnormally ( 1)
• The open error code is stored in the buffer memory. ( 2)
• Open error detection (BFM#1602 "0010H" or "0015H")
• Area for module status (BFM#28 b6:ON)
6) Start the close processing writing 8000H to BFM#1602.
7) The Ethernet module executes the close processing.
• Sends the close request (FIN).
8) When the close processing completes normally ( 3)
• Open completion signal (BFM#2048 b0) : OFF
• Open/Close instruction status (BFM#1602 "0000
H
")
Содержание FX3U-ENET
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