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DC3
-
Relations among the ON-LINE switch, SLCT IN signal, DCl/DC3 code and
-
interface signals are shown in the table below.
-
Relations among ON-LINE, SLCT IN, DC1/DC3 and Interface Signal
ON-LINE
SLCTIN
DATA
DC1/DC3
ERROR
BUSY
ACKNLG
Switch
Signal
ENTRY
-
OFF-LINE
HIGH/LOW
DC1/DC3
LOW
HIGH
Not generated
Unable
Enable
-
DCl
HIGH
LOW/HIGH
Generated
(Normal
entry)
HIGH
-
Enable
DC3
HIGH
LOW/HIGH
Generated
(See
Note 2.)
ON-LINE
Enable
LOW
DC1IDC3
HIGH
LOW/HIGH
Generated
(Normal
entry)
-
NOTES:
-
1. In the above table, it is assumed that no ERROR status exists other than that
attributable to the OFF-LINE mode.
-
2. Once DC 3 is input and the printer enters the Deselected state, it will remain in that
state until DCI is input. In other words, while the printer is in the Deselected state,
-
all input data will be invalid.
-
3. The DCl/DC3 code is valid provided that the DIP switch pin 2-1
is
OFF, namely,
the level of SLCT IN at the pin No.
36
of the interface connector is HIGH. With
SLCT IN at LOW level or the DIP switch pin 2-1 position at ON,the printer is
always placed in the Selected state, and the DCI/DC3 code
is
not valid.
-
4. When power is applied, if SLCT IN is at HIGH level or the DIP switch pin 2-1 is
OFF, the printer is regarded as in the Deselected state.
-
-
-
-
-
-
-
-
-
-
3-17
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