7-26
Header: STX, Terminator: ETX
Receiving data:
The “reception done” flag, the “transmission done” flag, and the F159 (MTRN) instruction are
related as follows:
- The data is stored in the receive buffer in sequential order. When the header is received, the number of
bytes received is cleared, and the address (write pointer) in the receive buffer is reset to the initial
address.
- Reception is disabled while the “reception done” flag R9038 is on.
- Also, When F159 (MTRN) is executed, the number of bytes received is cleared, and the address (write
pointer) in the receive buffer is reset to the initial address.
- If there are two headers, data following the second header overwrites the data in the receive buffer.
- The “reception done” flag R9038 is turned off by the F159 (MTRN) instruction. Therefore, if F159
(MTRN) is executed at the same time the terminator is received, the “reception done” flag will not be
detected.
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