Seiko DPU-414 - Page 48

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(3) Error processing
The following characters are printed when an error occurs.
? (3FH): Framing error
! (21H): Parity error
* (2AH): Overrun error
Turn the power off and check computer and DPU-414 SWDIP switch
settings.
 Always power OFF the printer before the host computer. Powering
OFF the computer before the printer may cause the printer to print
several lines of "?" due to a FLAMING ERROR triggered by an
unstable signal output from the computer at power OFF. It does
not imply a printer malfunction.
(4) Signal Conditions
Standard
Item
Min. Typ. Max.
Unit
Input: Low Level Voltage -15.0

-3.0 V
Input: High Level Voltage 3.0

15.0 V
Output: Low Level Voltage

-12.0

V
Output: High Level Voltage

12.0

V
NOTE