SATO M5900RV Operation Manual page 49

Operation Manual
b. Verify that you've included all required parameters in the data
stream.
c. Verify the following:
• You have not typed a "0" (zero) for an "O" (letter) or vice-versa.
• You have not missed any <ESC> characters where they're
needed.
• Make sure all printer command codes are capital letters.
• Your protocol codes are set for Standard or Non-Standard and
your data stream is consistent with these.
5. If you've checked all of the above and the printer still isn't print-
ing, you may want to try a Receive Buffer Hex Dump to deter-
mine what (if anything) the printer is receiving from your
computer. See Hex Dump Diagnostic Labels.
The Centronics port is now listening for incoming data. Send
your print job. The printer will now print (only once) a Hexadec-
imal (Hex) Dump of everything it received from the host com-
puter. Each 2-digit hexadecimal character represents a
character the printer received. It may be tedious, but now you
can analyze and troubleshoot the data stream.
6. While checking the Hex Dump printout, if you notice 0D 0A (Car-
riage Return and Line Feed) characters throughout. The com-
mand string should be continuous. CR or LF characters are not
allowed between the Start Command (<ESC>A) and the Stop
Command (<ESC>Z). If you are using BASIC, it may be adding
these characters automatically as the line wraps. Adding a
"width" statement to your program can help to suppress these
extra 0D 0A characters by expanding the line length up to 255
characters.
If you're not programming in BASIC, check to see if you have an
equivalent statement in the language you're using to suppress
extra carriage returns and line feeds from your data being sent
out to the printer. We want the data stream to be one complete
line going to the printer.
M5900RV
6. Troubleshooting
49