14
LT360 Precision Turntable
DLL Programming Manual
Error - 7 : RS232 Invalid Return
This error indicates that the LT360 was expecting to produce a return
value for a Get command, but the return value was an empty string.
This error will generally occur if you are writing your own RS-232
program, and there are bugs in your program. Check the command
strings being sent to verify that they contain valid LT360 commands
and/or parameters. Case is not important, but spaces in the right or
wrong places can make a difference.
Error - 8 : USB Unknown Command
This error indicates that the LT360 did not understand the command
index sent via USB. This error is very uncommon. It probably indicates
faulty communication over USB, such as a cable being disconnected or
dirty connections. Possibly some other unusual problem.
Error - 9 : RS232 Command Timeout
This error indicates that the LT360 received some characters, but never
received a termination character [Null(0) or CR(13)] before the 10
second timeout expired. When the first character is sent to the LT360, a
timer is started. If a termination character is not received within 10
seconds, then this error is produced and the command buffer is cleared.
Receiving all of the characters for a command string should take very
little time, on the order of micro or milli seconds, so if a termination
charcater does not arrive within 10 seconds, something is wrong. The
LT360 uses this timeout to clear the command buffer every 10 seconds
if characters are received with no termination character. The termina-
tion character is mandatory to notify the LT360 that the entire com-
mand string has been sent and it can now process it.
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