Chapter 1 Product Description; Received Buffer Full Operation; Interface Selection - Epson Stylus Pro 7400 Service Manual

EPSON Stylus Pro 7400/7800/9400/9800
Supported Packet
Apply the following communication packet.
Table 1-71. Supported Packet
Packet
EPSONPackingCommand/Reply
Init/Reply
Exit/Reply
GetSocketID/Reply
GetServiceName/Reply
OPENChannel/Reply
CloseChannel/Reply
Credit/Reply
DataPacket
MessagePacket
OutofBandPacket
Local MIB
According to Type-B Level 3 Packet Mode correspondence, it corresponds to
Local MIB (Type-B/EMAP).
Refer to "1.4.7 MIB Function" (p.136)
Product Description
description Channel
Packet Mode shifting Ch00
Initialization Ch00
Exit from Packet Mode Ch00
Acquisition of Socket ID Ch00
Acquisition of Service Name Ch00
Open Channel Ch00
Close Channel Ch00
Send Credit Ch40
Printing data / reverse data Ch40
MIB PDU/Trap PDU etc. Ch04/05
Job control information etc. Ch40

1.6.4 Received Buffer Full Operation

If the receiving buffer free space becomes less than 32Kbytes when data is being
received from the USB interface or IEEE1394 interface, and there are no errors
occurring (including the pause status), the printer is limited to receiving data at 40byte/
sec, which prevents a host data transmission timeout. When the receiving buffer returns
to above 36Kbytes of free space, receiving returns to normal.
NOTE: This status is not occurred in Type-B Level 3 Packet Mode for Credit
administration.

1.6.5 Interface Selection

The printer has IEEE1394 interface, USB 2.0 interface, and optional interface. These
interfaces are selected manually by the default setting mode or selected automatically.
Manual selection
One of 3 interfaces can be selected; IEEE1394 interface, USB 2.0 interface,
optional interface.
Automatic detection
An interface used for the first print job after power-On is automatically determined
to be used from then. If the first job is interrupted in the middle of the data
transmission, and not restarted within 10 seconds, the printer goes back to idle
status and determines the interface which is used for the next job.
NOTE: This status is not implemented in Type-B Level 3 Packet Mode for
Channel administration. To move to idle status, close the
DataChannel.
Interface Selection and Interface State
When the printer is initialized or returned to the idle status (any interface is not
selected), the USB interface becomes non-NACK reply status, and the option
interface resets OFF-LINE bit of Main Status Register (MNSTS).
Interface
Revision B
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