Chapter 9 Appendix-Serial interface network use and communications protocoll
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9.2. Direct connection via RS-485 to the host device
PC
RS485
Drawing of Upper Computer RS-485 network data acquisition system
Notices:
When the flowmeter is in flowmeter network ,the following network IDN:13(0DH
ENTER), 10(0AH NEWLINE), 42(2AH*) and 38(26H&). The Network IDN is set in
M46.
9.3. Communication protocol and the use
The communication protocol format used by the ultrasonic flowmeter is an
expanded set of the Fuji FLV series flowmeter protocol. The host device requests
the flowmeter to answer by sending a "command". The baud rate of asynchronous
communication (Primary station; computer system; ultrasonic flowmeter is
generally 9600BPS. A single byte data format (10 bits): one start bit, one stop bit
and 8 data bits. Check bit: NONE.
9.3.1. FUJI protocol
The communication protocol format used by the ultrasonic flowmeter is an
expanded set of the Fuji FLV series flowmeter protocol. The host device requests
the flowmeter to answer by sending a "command". The baud rate of asynchronous
communication (Primary station: computer system; Secondary station: ultrasonic
flowmeter) is generally 9600BPS. A single byte data format (10 bits): one start bit,
one stop bit and 8 data bits. Check bit: NONE.
A data character string is used to express basic commands and a carriage return
