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Using Socket Services with CMND(490) Section 6-3
6-3-3 Communications Timing Chart
The timing of the status changes of the bits in the socket status area and the
Port Enabled Flag is shown in the following diagram.
6-3-4 Socket Service Timing Chart
The timing of the socket service open, send, receive, and close request com-
mands are shown in the following diagrams.
OPEN REQUEST
CLOSE REQUEST
1
0
1
0
1
0
1
0
1
0
Port Enabled Flag
Opening Flag
Receiving Flag
Sending Flag
Closing Flag
Open Flag
1
0
1
0
Open request
received
Open complete
Receive request
received
Receive complete
Send request
received
Send complete
Close request
received
Close complete
1
0
1
0
1
0
Port Enabled Flag
CMND(490) response code
Opening Flag
Open Flag
Results storage area
Running Running
Error response code
Normal response code
OPEN REQUEST
command received
Error
end
OPEN REQUEST
command received
Normal
end
Open complete
(normal end)
Store normal response code
1
0
1
0
1
0
Port Enabled Flag
CMND(490) response code
Closing Flag
Close Flag
Results storage area
Running Running
Error response code Normal response code
Store normal response code
CLOSE REQUEST
command received
CLOSE REQUEST
command received
Error
end
Normal
end
Close complete
(normal end)