Table of Contents
Advertisement
3.2 Error Display
This printer indicates errors on the control panel. There are three groups of errors as explained below.
(1) Warning errors
The buzzer sounds and the ONLINE indicator still lights.
For a data transmission error in the interface, only the buzzer indicates the error. The printer continues printing
unless placed offline or other groups of errors occur. See Table 3.1.
Error name
Parity error
Framing error
Overflow error
Download error
Overrun error
Transmission
timeout error
Note:
Incorrect settings on the RS-232C do not always cause parity or framing errors. If the baud rates of the host
computer and the printer are multiples of 4800, such as 19200, framing errors are not detectable, and meaningless
data indicates a setting error. These errors do not affect the line from the host computer. An error remains if
the printer is online and no other warning is displayed until pushbutton operation or an operational error or fatal
error is detected.
Table 3.1 Warning errors
Cause of the error
An incorrect parity condition is detected in received
data in the RS-232C interface.
• Besides parity, this error may also occur due to
incorrect setting.
• The printer prints question marks (?).
An incorrect stop bit condition is detected in received
data in the RS-232C interface.
• The printer prints a question mark (?) for the first
error byte then ignores the succeeding data.
The host transmits data to the printer although the
input buffer is full of data (i.e., while the printer is
requesting the host to stop data transmission).
• The printer ignores the data (data is lost) and a
question mark (?) is stored in the input buffer when
the error is recovered.
The download buffer overflows.
• The printer ignores the data (data is lost).
The printer cannot accept data at the rate it is
transmitted. That is, while the printer is reading out
the input buffer, the host transmits the next data.
• The printer ignores the data (data is lost).
While the printer attempts to transmit data to the
host, ten seconds elapse with the output buffer full of
data.
• The printer ignores the data (data is lost).
31
Recovery
• Check the baud rate and data
format.
• Check the interface cable.
Check all settings for the
RS-232C interface.
• Reduce downloaded data.
• Reduce the print buffer
capacity, i.e., increase the
download buffer capacity.
Check all settings for the
RS-232C interface.
Advertisement
Table of Contents
