C.ITOH 8510A User Manual page 42

When an abnormality occurs in the printer, the printer will be deselected under any of the
following conditions.
1. When the paper has run out.
2. The cover is open.
3. When the carrier has overrun.
4. There is remnant printer data even after the carrier has passed the left detection position.
5. When the printer is in DESELECT status.
The signals to the host CPU at this time are as follows:
In Case of RS232C
At abnormal printer time
At printer restored time
RDY/BSY
FAULT = L
FAULT=H
system
DTR=L DTR=L
ETX/ACK
FAULT = L FAULT = H
system
XON/XOFF FAULT = L FAULT=H
system X OFF output XON output
In Case of 20 rnA Current Loop (CD only)
At abnormal printer time At printer restored time
RDY/BSY DTR line is in SPACE state. DTR line is in MARK state.
system
(No 20 rnA current flows.) (A 20 rnA current flows.)
ETX/ACK
-
-
system
X ON/X OFF
XOFF output
XON output
system
Note 3: The INPUT PRIME signal causes the printer to be reset when a space state (break state)
of more than one character is detected in the received data regardless of the protocol.
-40-