Section 7: Interface Specifications
Page 7-4
HR2 Series Operator Manual
7.2 RS232C HIGH SPEED SERIAL INTERFACE (Cont’d)
7.2.3 X-ON/X-OFF
This transmission protocol informs the host if the printer can receive data or not, by sending the “XON” (Hex
11H) or “XOFF” (Hex 13H) code to SD line.
Single-item buffer and multiple buffers are switchable in the interface mode of the printer.
When the print data (STX ESC+"A"~ ESC+"Z" ETX) is sent from the host in the conditions below, received
data may be incorrect.
1) When the printer is in Offline state
2) When an error has occurred in the printer
Pin Assignments
Note:
Depending on the host used, it may need to loop CS and RS (maintaining at “High” level) on the host side.
Therefore, make sure to re-check the host before use.
Input/Output Signals
Pin no. Signal Type Direction Description
2 RD Input Data transferred from the host to the printer
3 SD Output Data transferred from the printer to the host
5 SG - Signal ground
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