Reply with unknown command, Reply in case of communication error, Reply with diagnosis command – Rice Lake PR5230 Fieldbus Transmitter User Manual
Page 182: Sma protocol, Pr 5230 instrument manual
SMA Protocol
PR 5230 Instrument Manual
EN-182
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Reply with Unknown Command
<LF> ? <CR>
A command from the controlling computer that is not implemented, or invalid, is replied
with an ASCII ‘?’.
Reply in Case of Communication Error
<LF> ! <CR>
A command from the controlling computer that is unknown to the scale due to a
communication error is replied with an ASCII ‘!’. This includes parity error or frame error (if
any).
Reply with Diagnosis Command
When a diagnosis command is given, the scale makes a test and gives a status reply.
<LF> <r> <e> <c> <m> <CR>
Reply format and meaning:
<LF>
Start of diagnosis reply
<r>
‘R’ = RAM or ROM error; ‘_’ = OK,
<e>
‘E’ = EEPROM error; ‘_’ = OK
<c>
‘C’ = calibration error; ‘_’ = OK
<m>
Always: ‘_’ = OK
<CR>
End of the diagnosis reply
Example: without error status!
Command:
<LF>D<CR>
Reply:
<LF> <_> <_> <_> <_> <CR>