Epson TM U200D Technical Reference - Page 150
Appendix, Rev. B, If the electric potential of DR1 is higher than that of DR2
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If the electric potential of CS1 is higher than that of CS2, the TM series printers are ready for communication (the host is ready to receive data). If the electric potential of CS1 is lower than that of CS2, the TM series printers are not ready for communication (the host is not ready to receive data). DR1 DR2 H L L H Communication is available Communication is not available Function If the electric potential of DR1 is higher than that of DR2, the TM series printers are ready for communication (the host is ready to receive data). If the electric potential of DR1 is lower than that of DR2, the TM series printers are not ready for communication (the host is not ready to receive data). Appendix A-2 Rev. B
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Appendix
A-2
Rev. B
If the electric potential of CS1 is higher than that of CS2, the TM series printers are ready for
communication (the host is ready to receive data).
If the electric potential of CS1 is lower than
that of CS2, the TM series printers are not ready for communication (the host is not ready to
receive data).
If the electric potential of DR1 is higher than that of DR2, the TM series printers are ready for
communication (the host is ready to receive data).
If the electric potential of DR1 is lower than
that of DR2, the TM series printers are not ready for communication (the host is not ready to
receive data).
DR1
DR2
Function
H
L
Communication is available
L
H
Communication is not available