Initialization - Epson Stylus Pro 9500 Service Manual

EPSON Stylus Pro 9500
1.2.1.2 Interface Selection
It is possible to switch between the manual fixed selection function or auto
selection function to select one of the interfaces which the printer is equipped
with (parallel, serial or optional interface).
o
Manual Fixed Selection:
One of the interfaces which the printer is equipped with, can be selected
and fixed as the default setting.
o
Auto Selection Function:
After the power is turned on, the interface from which data are first
received is selected. After that, if a predetermined period of time (fixed at
10 seconds) passes during which the reception of data is stopped, the
printer enters the idle state (a state where no interface is selected), then
selects the interface from which it first receives data next.
o
Concerning interface selection and interface state:
n
When an interface other than the parallel interface is selected, the
parallel interface is set in the BUSY state. At this time, the LH signal
goes "L." The meaning of LH = L is that the power is cut off. That is, it
shows that the 1284 interface cannot respond. Therefore, a host
computer requesting reverse transmission must first check LH.
When the serial interface is not selected, DTR switches to the MARK
(High) state.
n
When the optional interface is not selected, the OFF-LINE bit is set in
the Main Status Register (MNSTS).
n
After the printer has been initialized, or when it is in the idle state (with
no interface selected), the status of each interface is a shown below.
• Parallel Interface : READY State
• Serial Interface : DTR = SPACE (Low) State
• Optional Interface : OFF-LINE bit of the Main Status Register
(MNSTS) is reset.
n
An interrupt signal, like the -INIT signal of the parallel interface, is
disregarded while that interface is not selected and while in the Nibble
mode or ECP mode.
Product Description

1.2.2 Initialization

This section describes the initialization procedures for the EPSON Stylus Pro
9500. There are three ways to initialize the EPSON Stylus Pro 9500:
o
Hardware initialization:
When the power is turned on or a cold-reset command is sent to the printer
(remote RS command), the printer does the following:
n
Initializes the printer mechanism
n
Clears the input data buffer
n
Clears the print buffer
n
Restores the default values
o
Software initialization:
When the printer receives an ESC@ command, it does the following:
n
Clears the print buffer
n
Restores the default values
o
Control panel (operator) initialization:
When the Reset button is pressed or the printer receives an -INIT signal
(negative pulse) from the parallel interface, the printer:
n
Paper Eject (In the case of roll paper, the printed part is skipped and
when "Auto; Cut" is set in the paper select settings of the panel
settings, the paper is cut, and when "Cutter Off" is set, the paper is not
cut.)
n
Caps the printheads
n
Clears the input data buffer
n
Clears the print buffer
n
Resets the default values
SPECIFICATIONS
Revision A
23