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2.2.2  HOST Port 
Table 2.2    HOST port communication specifications 
 
Item  Specifications 
Interface  RS-232C 
Synchronous system  Start-stop synchronization system 
Communication system  Half-duplex system 
Communication rate  300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 
115200 bps 
Data format  ASCII code 
No. of transfer bytes  Max. 255 bytes 
Transfer data structure    Data length: 7 or 8 bits 
Parity: None, odd, even 
Stop bit: 1 or 2 bits 
Protocol  Simple protocol communication 
Timeout  10 sec. (character receiving intervals) 
Fault recovery  Command is re-sent from the host computer. 
No special protocols are used. 
 
  Note:  The communication rate and transfer data structure are specified in the user 
parameter file.    (For details, see Para. 2.3.)