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The response characters are described in Table 3.
• SERIES1 2 CHAR. This protocol behaves exactly the same as
the Series1 Char except there is a two-character response to
the host. The response characters are described in Table 4.
• DTR. The printer controls the data flow by sending this
hardware signal to the host. If there is enough room in the
printer buffer, the printer will send a high signal; if the buffer is
full, the printer will send a low signal. DTR tells the host if it is
safe to send more data. (If the host sends data during an
unsafe condition, data will be lost.) DTR is not available when
RS-422 is selected.
Table 3. Series1 1 Char Response Characters
Printer State Response
Online and Buffer Empty CR
Online and Buffer Full 3
Offline and Buffer Empty 0
Offline and Buffer Full 2
Table 4. Series1 2 Char Response Characters
Printer State Response
Online and Buffer Empty 1 CR
Online and Buffer Full 3 CR
Offline and Buffer Empty 0 CR
Offline and Buffer Full 2 CR