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(13) Transmission Control : XON/XOFF (DC1/DC3) Protocol
XON/XOFF (DC1/DC3) Protocol
When initialized after power on, this printer becomes ready to receive data and sends an
XON code (11H). (Transmission or non-transmission of XON code is selectable by means
of the DIP switch.)
The printer sends an XOFF code (13H) when the blank positions in the receive buffer
become 800 bytes or less.
The printer sends an XON code (11H) when the blank positions in the receive buffer are 2K
bytes or more.
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, the host computer must stop transmission before the printer receive buffer
becomes full.)
The printer sends an XOFF code (13H) when the power is off. (Transmission or non-
transmission of the XOFF code is selectable by means of the DIP switch.)
READY/BUSY (DTR) Protocol
When initialized after power on, this printer becomes ready to receive data and turns the
DTR signal to "High" level (READY).
The printer turns the DTR signal to "Low" level (BUSY) when the blank positions in the
receive buffer are 800 bytes or less.
The printer turns the DTR signal to "High" level (READY) when the blank positions in the
receive buffer are 2K bytes or more.
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.)
XON/XOFF (DC1/DC3) Protocol + READY/BUSY (DTR) Protocol
When initialized after power on, this printer becomes ready to receive data and turns the
DTR signal to "High" level (READY). It also sends an XON code (11H).
When the blank positions in the receive buffer are 800 bytes or less, the printer turns the
DTR signal to "Low" level (BUSY) and sends an XOFF code (13H).
When the blank positions in the receive buffer are 2K bytes or more, the printer turns the
DTR signal to "High" level (READY) and sends an XON code (11H).
When there are no blank positions in the receive buffer, the printer discards 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.)
The printer sends an XOFF code (13H) when the power is off.
NOTE: In READY/BUSY (DTR) Protocol, data should be sent 200 ms or later after the DTR
signal becomes "High" level (READY) when the printer is turned on.
READY/BUSY (DTR) Protocol
XON/XOFF (DC1/DC3) Protocol + READY/BUSY (DTR) Protocol
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