Data Flow; Pass-Through Connection - Epson DM-D110 Technical Reference Manual

4.2 Data Flow

4.2.1 Pass-through Connection

With the pass-through connection, the command from one serial port of the host personal
computer is transmitted through the DM-D stand to control the DM-D110, the printer and the
drawer. The data flow which is connected through the DM-D stand is as follows.
Host PC
Printer
With the pass-through connection, the data from the host personal computer is stored in the
reception buffer of the display, and then the data is processed sequentially and only data for
the printer is transmitted to the printer. The data transmitted from the printer is transmitted
to the host personal computer directly without passing the display.
The peripheral equipment elective command distinguishes between the data for the DM-
D110 and the data for the printer.
The communications condition of the host personal computer, the printer, and the DM-D110
are set to the same condition.
4-2 Hardware
DM-D stand
Power supply
DM-D110
(Display)
Transmit data from the host PC
Transmit data to the printer
Transmit data to the host PC from
the printer
Rev. A