A.6.4 confirmation response, A.6.5 error response, A.6.6 end of message – Comtech EF Data DT-4500-A Series User Manual
Page 116: A.6.6.1 command ending, A.6.6.2 response ending
DT-4500-A Series Downconverters
Revision 1
Appendix A
MN-DT4500A
A–6
Note: This appendix uses “/COM” for the generic case examples.
Example:
<DEV/COM_xxx'cr'
(Sends data to a converter.)
Example:
<DEV/COM_'cr' (Requests information from a converter.)
A.6.4 Confirmation Response
A confirmation will change the start character, and echo the Device Address and Command. Any
requested data will be appended to the Command.
Example:
>DEV/COM_xxx'cr''lf']
A.6.5 Error Response
If a converter cannot execute a Command or detects a protocol violation, an error response is
generated. An error is flagged by changing the “/” command designator in the response to a "?".
Following the "?" error symbol are two characters which are unique error symbols useful for
computer analysis. The two error symbols are followed by a text string explaining the error for
the convenience of a human operator. This appendix uses “ER” for the generic case examples
response.
Example:
>DEV?COM ER Error Message 'cr''lf']
A.6.6 End of Message
End of message strings were devised in such a way that an orderly screen presentation would
result when converters are controlled by simple ASCII terminals.
A.6.6.1 Command Ending
The end of message for a command is a carriage return. This appendix uses “cr” for the carriage
return.
Example:
<DEV/COM_'cr'
A.6.6.2 Response Ending
End of message for a response is a carriage return, line feed and a bracket: “'cr''lf']”.
Example:
>DEV/COM_'cr''lf']