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

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Toshiba T2N instruction manual ⎯ 94 ⎯