eXON/XOFF (DC1/DC3) Protocol + READY/BUSY (DTR) Protocol
z When initialized after the power is turned on, this printer becomes ready to receive data and turns the DTR signal to “High” level (READY). The printer also sends an XON code (11H).
z When the blank positions in the receive buffer become 10 Kbytes or less, the printer turns the DTR signal to “Low” level (BUSY) and sends an XOFF code (13H).
z When the blank positions in the receive buffer become 512 Kbytes or more, the printer turns the DTR signal to “High” level (READY) and sends an XON code (11H).
z When there are no blank positions in the receive buffer, the printer discards data received exceeding the receive buffer capacity, without storing it in the buffer. (After detecting the XOFF code or BUSY signal, the host computer must stop transmission before the printer receive buffer becomes full.)
z The printer sends an XOFF code (13H) when the power is off. z The RTS signal is always “High”.
fREADY/BUSY (RTS) Protocol
z When initialized after the power is turned on, this printer turns the RTS signal to “High” (READY).
z The printer turns the RTS signal to “Low” (BUSY) when the blank positions in the receive buffer become 10 Kbytes or less.
z The printer turns the RTS signal to “High” (READY) when the blank positions in the receive buffer become 512 Kbytes or more.
z When there are no blank positions in the receive buffer, the printer discards data received exceeding the receive buffer capacity, without storing it in the buffer. (After detecting the BUSY signal, the host computer must stop transmission before the printer receive buffer becomes full.)
z The DTR signal is always “High” (READY).
z The DSR signal from the host must always be “High”.
*When the flow control is performed with a Windows PC, “READY/BUSY (RTS) protocol” should be selected, and “Hardware” should be selected for the flow control in the Windows communication port setting.
NOTE: For “READY/BUSY (DTR) protocol”, data should be sent after 200 ms from when the DTR signal is turned to “High” (READY). For “READY/BUSY (RTS) protocol”, data should be sent after 200 ms from when the RTS signal is turned to “High” (READY).
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