TEC SX4T - B B/W Direct Thermal User Manual page 125

1. OUTLINE
g
Error detection
T
Parity check:
T
Framing error:
h
Data entry code:
i
Receiving buffer:
j
Protocol
T
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 parameter setting.)
• The printer sends an XOFF code (13H) when the free area in the receive buffer
becomes 10K Bytes or less.
• The printer sends an XON code (11H) when the free area in the receive buffer are
512KB or more.
• When there is no free area in the receive buffer, the printer discards received data which
exceeds 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) at power off time. (Transmission or non-
transmission of XOFF code is selectable with the parameter setting.)
• The DTR signal is always "High" level (Ready).
• The RTS signal is always "High" level (Ready).
T
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 free area in the
receive buffer amount to 10K bytes or less.
• The printer converts the DTR signal to "High" level (READY) when the free area in the
receive buffer amount to 512KB or more.
• When there is no free area in the receive buffer, the printer discards received data 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 RTS signal is always "High" level.
T
XON/XOFF (DC1/DC3) protocol + 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 free area in the receive buffer are 10K bytes or less, the printer converts the
DTR signal to "Low" level (BUSY) and sends an XOFF code (13H).
• When the free area in the receive buffer are 512KB or more, the printer converts the
DTR signal to "High" level (READY) and sends an XON code (11H).
• When there is no free area in the receive buffer, the printer discards received data 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.
• The RTS signal is always "High" level.
VRC (Vertical Redundancy Checking)
This error occurs when no stop bit is found in the frame specified
starting with the start bit.
ASCII, 8-bit code for European characters, 8-bit code for graphic
B-SX4T: 1MB, B-SX5T: 6MB
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EO10-33013A
1.5 ELECTRONICS SPECIFICATIONS