Epson TM U200D Technical Reference - Page 29

TM-U200D/U200PD Technical Manual NOTES: t When the remaining space in the receive buffer is 16 bytes, the printer becomes buffer-full. This status continues until the space in the receive buffer increases to 32 bytes. t The printer ignores the data received when the remaining space in the receive buffer is 0 bytes. On-line/Off-line switching The printer does not have an on-line/off-line button. The printer goes off-line under the following conditions: t Between the time when the power is turned on (including reset using the interface) and when the printer is ready to receive data. t During the self-test. t During paper feeding using the PAPER FEED button. t Between the time when the printer stops printing due to a paper-end and when the on-line recovery wait time finishes after loading paper (in cases when empty paper supply is detected by either the paper roll end detector or the paper roll near-end detector with a printing halt feature set enabled due to paper shortage by ESC c 4). t When an error has occurred. XON/XOFF transmit timing When XON/XOFF control is selected, the printer transmits XON or XOFF signals as follows. Printer status DIP SW 1-8 status ON OFF XON transmission • When the printer goes on line after turning on the power or reset using interface. • When the receive buffer is released from the buffer full state. • When the printer switches from off line to on line (*1). • When the printer recovers from an error through a command. Transmission Transmission ------Transmission Transmission Transmission Transmission Transmission Transmission XOFF • During an error condition transmission • When the receive buffer becomes full (*2). Transmission Transmission ---- Transmission (*1) XON is not transmitted when the receive buffer is full. (*2) XOFF is not transmitted when the receive buffer is full. NOTE: The XON code is H and the XOFF code is H. Rev. B Features and General Specifications 1-17