Initialization; Interface Selection - Epson Stylus Pro 9000 Service Manual

EPSON Stylus Pro 9000

1.5 Initialization

This section describes the initialization procedures for the EPSON Stylus Pro
9000. There are three ways to initialize the EPSON Stylus Pro 9000:
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:
Initializes the printer mechanism
Clears the input data buffer
Clears the print buffer
Restores the default values
Software initialization:
When the printer receives an ESC@ command, it does the following:
Clears the print buffer
Restores the default values
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:
Caps the printheads
Ejects the paper if a cut sheet is loaded
Clears the input data buffer
Clears the print buffer
Resets the default values
The default values are shown below.
Page Position: Current paper position as page-start position
Line feed: 1/6"
Right margin: 440th character
Left margin: 1st character
Character pitch: 10 CPI
Print mode: Text mode (non-raster graphics mode)
Product Description

1.6 Interface selection

The printer has three built-in interfaces: parallel, serial, and Type-B (an
optional interface requiring an interface card). These interfaces are selected
automatically or manually through the control panel.
Manual Selection:
Select the desired interface through the default setting mode, described
below under Maintenance Mode (Level 1).
Automatic Selection:
Automatic interface selection is enabled by the default setting mode,
described below under Maintenance Mode (Level 1). When the automatic
selection is active, the printer passively scans all interfaces. The interface
that receives data first is selected as the active interface. When the host
stops sending data and the printer has been in a standby state for 10
seconds, the printer returns to an idle state. Otherwise, the interface
remains active.
Other things to keep in mind about interface selection:
The host checks whether the logic signal is low or high before requesting
data through the reverse channel.
If the parallel interface is not selected, it enters a BUSY state and the logic
signal is set low.
When the serial interface is not selected, the DTR (data terminal ready)
signal is set to MARK.
When the optional type-B interface is not selected, the off-line bit is set to
Main Status Register (MNSTS).
When the printer is initialized or returns to an idle state, the parallel
interface enters a ready condition, the serial DTR signal is set to low, and
the off-line bit of the Main Status Register (MNSTS) is reset.
The /INIT signal on the parallel interface is not active while that interface is
in Nibble or ECP Mode, or is not selected.
Initialization
Revision B
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