Service manual

General
Description
Table 1-9 shows the handshaking (DC1/DC3) protocol.
Table 1-9. Handshaking (DC1/DC3) Protocol
Notes:
1.
Table 1-9 assumes that no *ERROR status exists other than that due to off line mode.
2.
When the printer receives a DC3 code, it ignores input data. When the printer receives a DC1
code, data transmission continues.
3.
The DC1 and DC3 codes are enabled only when the SLCT-IN signal (pin number 36) is HIGH and
the printer is initialized.
4.
If the SLCT-IN signal is LOW when the printer is initialized, DC1/DC3 handshaking is invalidated
and the printer ignores the DC1/DC3 control codes.
5.
If the SLCT-IN signal is HIGH when the printer is initialized, the printer starts from the selected
(DC1) state.
6.
Minus signs are used in this table to indicate active LOW signals.
LQ-200/AP3000
1-17