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
?
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
!
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.
Reply format and meaning:
Start of diagnosis reply
‘R’ = RAM or ROM error, ‘_’ = OK,
‘E’ = EEPROM error, ‘_’ = OK
‘C’ = calibration error, ‘_’ = OK
Always: ‘_’ = OK
Start of the diagnosis reply
Example: without error status
Command
Reply
D <_> <_> <_> <_>