Fairbanks X SERIES PR 5220 ETHERNET TRANSMITTER - Manual (Page 76)

Section 6: SMA Protocol
05/11 77 51209 Revision 2
6.6.2 Reply with Unknown Command
<LF> ? <CR>
A command from the controlling computer that is not implemented, or invalid, is
replied with an ASCII ‘?’.
6.6.3 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).
6.6.4 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> Start of the diagnosis reply
Example: without error status
Command
Reply
<LF>D<CR> <LF> <_> <_> <_> <_> <CR>