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6 F 3 B 0 3 6 2
h.UDP reception processing example (Receive request issued first type)
Ladder program flowchart
UDP reception processing start
Socket status read/verify
Are bits C and E both 1? | No |
(Opened state?) |
|
Yes |
|
Execute a UDP receive request
(CMD = 0033H).
Hold the input of function block in the on state until the RECV instruction completes.
Instruction completion
Verify the status
Did
the operationNo complete before being
timed out?
Error result
The processing in this section can be performed at this stage or at the point the instruction terminates abnormally.
The specified UDP socket is in the closed state. (Open processing is required.)
Text was not received within the time limit.
Yes
Normal complete?
Yes
No
An error occurred in reception processing. The specified socket could not receive the data.
Handle the error according to the completion and socket status.
Terminate UDP reception processing