Rs-232C Interface; Transmission Control (Xon/Xoff Protocol) - Toshiba B-EP Series Interface Specification

3.5 RS-232C INTERFACE

Item
Communication mode
Communication direction
Transmission rate
Start bit
Stop bit
Data length
Parity
*2
Error detection
Received buffer
*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.)
Specifications
Normal mode
Start-stop synchronization mode
Transmission/reception (Full duplex)
9600, 19200, 38400, 57600, 115200 bps
1 bit
1 bit
8 bits
None/Even (depending on the setting)
Overrun error
Framing error
Parity error
512K bytes
3-43
CHAPTER 3 INTERFACE
B-EP Series
*1