AH500 Programming Manual the timeout period set. It is suggested that the timeout period set should be longer than the time set in D 2 +1. Mode of receiving data: 2, 3, 5, or 6 Description: ① Users start/stop the execution of the instruction. ② Time in which data is sent The period of time in which data is sent is not measured. ③ After the first character is received, the time which passes before the next character is received will be measured. Whenever a character is received, the time measured is cleared. A communication timeout flag will not be set to ON until the time measured exceeds the timeout period set.
④ If the instruction is still enabled after users reset a completion flag or a communication flag, the next communication data is sent automatically when the instruction is scanned in the next cycle. 12. Mode of sending data/Mode of receiving data 8-bit mode: The command which is edited is stored in the initial transmission device, and the command which will be sent include the head code and the tail code. The 16-bit data is divided into the high 8-bit data and the low 8-bit data. The high 8-bit data is ignored, and the low 8-bit data can be sent or received. (Take standard Modbus for example.) Sending the data: (PLC→External equipment) Receiving the data: (External equipment→PLC) 6-426