Sharp JW-20CM - Manual (Page 170)

10 · 2
10-2 Communication method
The host computer communicates with each station number one by one.
The host computer instructs station number/communication contents/memory address/data
etc. of the communicating station as a “command.”
The “command” receiving station processes this data and returns the result as “response.”
On the computer link, the host computer can communicate with any required station regardless
of whether it is the master or slave station.
Master station 00 (8) Slave station 01 (8)
Command
Response
Host computer
Slave station 02 (8) Slave station 03 (8)
System example