Chapter 6 Applied Instructions Receiving the data: (External equipment→PLC) 16-bit mode: The command that is edited is stored in the initial transmission device, and the command to be sent includes the head code and the tail code. When SM106/SM107 is OFF, the instruction divides the 16-bit data into the high 8-bit data and the low 8-bit data. Sending the data: (PLC→external equipment) Receiving the data: (External equipment→PLC) 6_ The data that the PLC receives from the external equipment includes the head and the tail code; therefore, you have to be aware of the setting for the length. 11.
When the mode is 7 or 8, the corresponding communication port and the interrupt number are listed in the following table. 12. The instruction cannot be used in the ST programming language, interrupt tasks or function block which is called only once. 6-553 Communication port COM1 COM2 Card1 Card2 number Interruption number I300 I302 I304 I306