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APPENDIX D
4618-021
130
Command Identifier - ‘E’ Error Codes
In the case of an error in a received message being decoded at the detector, an error message would be returned to
the host. This message would take the following form :-
‘E’
e
‘,’
m
where e is the major error number. This can have one of the following values:-
Table D-2 Major error codes
e (major error) Type of error Description of error
0 No Error, OK Received command was OK.
1 Protocol Error The detector tried to send too many commands, within a single
message, and caused a buffer overflow, (see later).
2 Identifier Error An unknown identifier was received. Please refer to the tables of
acceptable identifiers.
3 Value-list Error A comma was missing, wrong value type, letter instead of
number in the received command, etc
4 Bounds Error A value was outside acceptable limits. Please refer to the
previous tables for the range that values can take.
5 Not used Reserved for future development
‘m’
is the minor error number, and takes on a different meaning dependent upon its preceding major error number.
Table D-3 Minor error codes
m (minor error) Description of error
0 No Error, this is sent only with the major-error number set to 0.
1 Buffer Error, this is sent with the Protocol Error major number. This means that
the transmit buffer inside the detector, (256 bytes long), was filled.
Decimal number This number is the decimal representation of an ASCII character.
In the case of an Identifier Error this character was not recognised as an
acceptable identifier.
In the case of a Value-list Error this character or number caused the Value-list
Error.
In the case of the Bounds Error this character is the identifier whose value(s)
were outside the acceptable range.