
Appendix A-6 Rev. A
Notes:
❏ The handshaking data word length, baud rate, and parity depend on the DIP switch settings.
❏ Data transmitted from the printer has 1 stop bit (fixed).
❏ DR1 > DR2 CS1 > CS2 indicates that:
Channel 1 is high.
Channel 2 is low.
❏ DR1 < DR2 CS1 < CS2 indicates that:
Channel 2 is high.
Channel 1 is low.
Signal levels and communication control functions
If the electric potential of CS1 is higher than that of CS2, the printer is ready for communication
(the host is ready to receive data). If the electric potential of CS1 is lower than that of CS2, the
printer is 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 printer is ready for communication
(the host is ready to receive data). If the electric potential of DR1 is lower than that of DR2, the
printer is not ready for communication (the host is not ready to receive data).
Switching between on-line and off-line
The printer does not have an on-line/off-line switch.
The printer goes off-line:
❏ Between when the power is turned on (including reset using the interface) and when the
printer is ready to recieve data.
❏ During the self-test.
❏ When the cover is open.
❏ During paper feeding using the paper feed button.
CS1 CS2 Function
H L Communication is available
L H Communication is not available
DR1 DR2 Function
H L Communication is available
L H Communication is not available
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