CHAPTER 3 INTERFACE
B-EP Series
3-43
3.5 RS-232C INTERFACE
Item Specifications
Normal mode
Communication mode Start-stop synchronization mode
Communication direction Transmission/reception (Full duplex)
Transmission rate 9600, 19200, 38400, 57600, 115200 bps
*1
Start bit 1 bit
Stop bit 1 bit
Data length 8 bits
Parity None/Even (depending on the setting)
Error detection
*2
Overrun error
Framing error
Parity error
Received buffer 512K bytes
*1: Values are dependent on the communication protocol settings.
*2: Error detection is available in the RECEIPT mode only.
3.5.1 TRANSMISSION CONTROL (XON/XOFF PROTOCOL)
• The printer sends an XOFF code (13H) to the host, when the blank positions in the receive
buffer become 10Kbytes or less.
• The printer sends an XON code (11H) to the host, when the blank positions in the receive buffer
become 256Kbytes or more.
• When there are no blank positions in the receive buffer, the printer discards the received data
which exceeds the receive buffer capacity without storing it in the buffer, and the buffer full error
occurs. (After detecting the XOFF code, the host must stop transmission before the printer
receive buffer becomes full.)
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