7-47
Sending data:
The “reception done” flag, the “transmission done” flag, and the F159 (MTRN) instruction are related as
follows:
• Header (STX) and terminator (ETX) are automatically added to the data being transmitted. The data is
transmitted to an external device.
• When the F159 (MTRN) instruction is executed, the “transmission done” flag R9039 or R9049 goes off.
• Duplex transmission is disabled while F159 (MTRN) is being executed. The “transmission done” flag
R9039 or R9049 must be observed.
Key Point:
• The contact numbers in parentheses refer to COM2 port.
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