Instruction manual

Data1 Command
(Wait 0.5sec )
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(No action due to receipt of no command)
Data1 Command
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Data1 Response(Ack)
Data2 Command
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Data2 Response(Nak)
Data2 Command
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Data2 Response(Ack)
Data3 Command
(Due to no response,Waiting
for 0.5sec)
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Data3 Response(Ack)
Data3 Command
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Data3 Response(Ack)
(The printer,that received data3 two times,Only send ACK
response and do not print second data3)
End Command
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End Response(Ack)
5.4 Phase 2 with Data Command
HOST Direction Printer
Start Command
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Start Response(Ack)
Data1 Command
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Data1 Response(Nak) or no response
Data1 Command
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Data1 Response(Nak) or no response
Data1 Command
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Data1 Response(Nak) or no response
End Command
(Ignore the Response)
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Due to obstacle or printer’s problem,The host indicate no communication
Proceed
5.5 Phase 3 with no Data Command
Host Direction Printer
Start Command
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Start Response(Ack)
Data1 Command
(No receipt of data1 response within
0.5sec after receiving wait response
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Wait Response
Data1 Response(Ack)
Data1 Command
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Data1 Response(Ack)
(The printer,that receiced data1 two times,Only send ACK
response and do not print second data1
Data2 Command
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Data2 Response(Ack)
End Command
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End Response(Ack)
5.6 Phase with no End Command
Host Direction Printer
Start Command
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Start Response(Ack)
Data Command
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