Section 7: Interface Specifications
HR2 Series Operator Manual Page 7-3
7.2 RS232C HIGH SPEED SERIAL INTERFACE (Cont’d)
7.2.2 Ready/Busy
Ready / Busy is the hardware flow control method for the serial interface on the printer. Single item buffer and
multi buffer can be toggled 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
Interface 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.
4 ER Output Data device ready.
It goes “High” when the printer is ready to receive data.
It goes “Low” when an error has occurred in the printer
or when the printer is in offline state.
5 SG - Signal ground
6 DR Input Data set ready.
7 RS Output Transmission request.
8 CS Input Transmission available
9 RI Input Call
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