Confidential
EPSON
TITLE
SHEET
REVISION
NO.
SHEET
NEXT
B
RP-U420 series
Specification
(STANDARD)
41
40
3) Errors that cannot be recovered
Table 3.5.3 Unrecoverable Errors
Error
Description
ERROR LED blinking pattern (buzzer beeps)
Recovery
CPU
execution
error
CPU executes
incorrect address.
(1 long 3 short beeps)
160ms
500ms
660ms
160ms
Impossible to
recover.
High or low
voltage error
Power voltage is
extremely high or low.
(1 long beep)
500ms
660ms
Impossible to
recover.
ROM check
sum
ROM check sum error
(1 long 1 short beeps)
160ms
500ms
660ms
160ms
Impossible to
recover.
SRAM
SRAM access error
(1 long 2 short beeps)
160ms
500ms
660ms
160ms
Impossible to
recover.
NOTE: 1) If an error that cannot be recovered occurs, turn off the power as soon as possible.
2) A buzzer sound can be kept in silence with DIP SW 2-3 as shown in Table 3.3.4.
3.5.2 Operation when an error is detected
The printer executes the following operations when detecting an error:
<Serial interface model>
•
Stops all mechanical operations.
•
Sets the DTR signal to MARK.
•
Blinks the ERROR LED
•
Transmits XOFF if XON/XOFF control is selected.
<Parallel interface model>
•
Stops all mechanical operations.
•
Sets the Busy signal to HIGH.
•
Blinks the ERROR LED.
•
Sets the nFault signal to LOW.