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Appendix C Host Computer Interface
Verifying the Setting
C-12
The procedure described below should be followed to verify that the RS-422A mode had been
correctly set. Print the service status page to verify that the RS-422A mode has been correctly set.
1.
Make sure the power switch is off. Plug the power cord into the printer and turn power on.
2.
If the printer is on-line, select >>Print Status page in the Mode Select menu (refer to
Mode Select Menu at the end of this document), and print the service status page.
3.
Verify whether the setting is corrected by checking the status printed at the bottom of the page.
The following sample indicates that "RS-422A" is set "RS4". If "RS-232C" is set, "RS2" appears.
[Printer Status Page]
Interface Signals
The pins in the printer's RS-422A interface connector carry the signals listed in Table C. 3 .
Table C. 3. RS-422A Signal Pin Assignments
Pin
In/out
1
—
3
In
7
—
9
Out
10
Out
11
—
18
In
Indicates the current serial interface mode.
Signal
Description
FG
Frame ground
RDA
Receive data Inverted
SG
Signal ground
SDA
Send data Inverted
SDB
Send data
—
+5 V DC
RDB
Receive data
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