User`s manual

Chapter 6 - GP RUN and Errors
GP-477R/577R Series User's Manual
6-10
This check uses the Input unit's LED lights, in the following order.
! Set AUX lines from TSW0 to BUZZ, ON.
" Once all of them turn ON, they will turn OFF in the same order.
( Once all of them have turned OFF, the check is finished.
PRINTER I/F
PRINTER I/F checks to see if the printer operates normally. To perform this
check, the printer must be connected.
When a Print Buffer is used, sometimes an error occurs, so be sure to
connect the printer directly to the GP.
If the connection is normal, the printed section displays 20~7D<HEX> and
A0~DF<HEX> and OK; if there are problems, an error message appears.
SIO CHECK
Checks the RS-232C and RS-422 SIO lines for areas where communication
problems develop. In the menu, select which check to run. To run the
check, connecting the SIO cable is necessary. If all is normal, OK displays;
if there is a problem, an error message appears.
The SIO cable wiring is as shown below. (RS-232C, RS-422 common)
AUX