TEC B-450 SERIES, Руководство пользователя

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1. OUTLINE OF THE SYSTEM EO10-33003A
1.5 ELECTRONICS SPECIFICATIONS
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READY/BUSY (DTR) protocol
• When initialized after power on, this printer becomes ready to receive data and
converts the DTR signal to "High" level (READY).
• The printer converts the DTR signal to "LOW" level (BUSY) when the blank positions
in the receive buffer amount to 800 Bytes or less.
• The printer converts the DTR signal to "High" level (READY) when the blank position
in the receive buffer amount to 2KB or more.
• When there are no blank position in the receive buffer, the printer discards data
received which exceeds the receive buffer capacity, without storing it in the buffer.
(After detecting a BUSY signal, the host computer must stop transmission before the
printer receive buffer becomes full.)
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(READY/BUSY (RTS) Protocol
• When initialized after power on, this printer becomes ready to receive data and
converts the RTS signal to "High" level (READY).
• The printer converts the RTS signal to "Low" level (BUSY) when the blank positions
in the receive buffer amount to 800 bytes or less.
• The printer converts the RTS signal to "High" level (READY) when the blank position
in the receive buffer amount to 2KB or more.
• When there are no blank position in the receive buffer, the printer discards data
received which exceeds the receive buffer capacity, without storing it in the buffer.
(After detecting a BUSY signal, the host computer must stop transmission before the
printer receive buffer becomes full.)
• The printer must keep the DTR signal "High" level, and the host must keep the DSR
signal "High" level.
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XON/XOFF (DC1/DC3) pr READY/BUSY (DTR) protocol
• When initialized after power on, this printer becomes ready to receive data and
converts the DTR signal to "High" level (READY). The printer sends an XON code
(11H).
• When the blank positions in the receive buffer are 800 Bytes or less, the printer
converts the DTR signal to "LOW" level (BUSY) and sends an XOFF code (13H).
• When the bland positions in the receive buffer are 2KB or more, the printer converts
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 data
received which exceeds 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) at power off time.