Panasonic FP2 ET-LAN Technical Manual page 164

Example of transparent communication program (Transmission processing)
After the data being transmitted has been written to the transmission buffer of the shared memory, the
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following program is executed.
Initialization processing and open processing are automatically executed.
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Example of transparent communication program (Reception processing)
After the following program has been executed, the received data is read from the receive buffer of the
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shared memory.
Initialization processing and open processing are automatically executed.
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