Auto Select Interface - Dascom 1500 User Manual

Auto Select Interface

Auto Select Interface
The printer can receive data transmitted either a parallel interface or a USB interface as
standard. In addition, the printer can receive data transmitted either serial interface or Eth-
ernet interface as option.
When two different data is sent from different PCs, one by a parallel interface and the oth-
er by a USB interface in standard, or one by a parallel interface and the other by a optional
serial interface, the data reached the printer is received first and processed first and the
Busy signal is sent to other interfaces (Second).
Parallel interface and Ready/Busy in Serial interface. In case of XON/XOFF in Serial in-
terface, Printer sends XOFF to Host, if Host send data to Printer:
Other (Second) I/F
Parallel (Compatible mode)
USB
RS-232C (Ready/Busy)
RS-232C (XON/XOFF)
The printer has received all data and the receive buffer is cleared, the Busy status is cleared
and the printer starts to receive the data from the other interface when the state where
data are not received continues 1 seconds or more.
B-16
Status (during prior I/F to be activated)
BUSY to High
NAK (first 1 packet data to be received)
BUSY
XOFF
Interfaces