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2.3
Communication Procedure Flowchart
2.3.1 Mode a
Ready/Busy
Received one
character?
Yes
Is DSR valid?
No
Buffer overflow?
Error?
Parity error
No error
Store the received
character in buffer.
Is the
printer in DESELECT
state or is the paper
low?
No
No
Yes
Yes
No
DSR High?
Yes
Store 40 H in buffer.
Yes
Yes
No
Yes
Is remaining
buffer space
≤
256?
Yes
No
Turn on the SSD signal.
Turn off the SSD signal.
Printer busy?
No
Output one character from the
buffer to printer.
No
Yes
No
Has 200 ms or
1s elapsed after SSD was
turned on?
Is remaining
buffer space > 256 during
receive time out?
Figure C-2
Содержание ML490 Series
Страница 1: ...42114101 Rev 1 1 135 ML490 491 PRINTER Maintenance Manual ODA...
Страница 2: ...42114101 Rev 1 2...
Страница 38: ...42114101 Rev 1 38 Drive gear Ink tank Ribbon cartridge Figure 2 6...
Страница 48: ...42114101 Rev 1 48 Change arm Change lever Platen Release cam Figure 2 13 REAR TOP BOTTOM...
Страница 96: ...42114101 Rev 1 96 9 Carriage Assy NK2 10 SUS Bearing portion of guide roller EM 30L B...
Страница 119: ...42114101 Rev 1 119 6 8 9 7 1 2 3 11 10 4 5 Figure B 2 Printer General Assy...
Страница 124: ...42114101 Rev 1 124 9 12 11 1 13 3 7 1 14 5 6 7 2 10 8 Figure B 4 Carriage Assy...
Страница 126: ...42114101 Rev 1 126 Figure B 5 Option Spare Parts Pull Tractor Bottom Tractor I F Board 3 2 1 4 5 6 7...
