Legacy Socket
D20980.022 Rev C CV-LS User Manual Page 80
Command Structure
The Legacy Protocol has followed the same structure as the LLS3 command protocol whenever possible.
If there is a command from the LLS3 that has been removed from the CV-LS, please contact technical
support (see the Technical Support section on page 94) with a request to restore a particular function.
Please include a description of the command that is missing, and how you need it to interface with your
Legacy application.
All commands start with the ampersand character “&” and end with a carriage return “\r”. There is a
string representing the command immediately after the “&”, followed by the desired value.
The unit will discard all characters until it receives an “&” start character. Once the carriage return “\r” is
received, the unit will process the command. If a valid command is not found, the unit will return “&n”
followed by the command string with an indicator of which character was not recognized.
Negative Acknowledgements
Negative acknowledgements are used to indicate that a received command was invalid. The following
negative acknowledgements are supported:
Return string format: &nXpY
&n = Negative acknowledgement
X = Received characters parsed correctly
p = Invalid character location start
Y = Invalid character received
Return string format: &nXpYYY
&n = Negative acknowledgement
X = Received characters parsed correctly
p = Invalid parameter location start
YYY = Invalid parameter received
Commands
Please download the programming guide, found under the Error! Reference source not found. Section
on page 94, for a full list of available commands and how to use them.
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