Acknowledge - Fluke CombiScope PM3370B User Manual

THE CPL PROTOCOL

6.6 ACKNOWLEDGE

The <acknowledge> is a synchronization reply that is returned after each
command sent to the oscilloscope, signalling correct or incorrect operation:
"0" Ok, normal situation
"1" Syntax error
"2" Execution error
"3" Synchronization error
"4" Communication error
Explanation and examples of the errors:
Syntax Error:
returned when the command is not understood by the oscilloscope for one of the
following reasons:
Unknown header, wrong instructions
*
Data format of body is wrong, e.g. alpha characters when decimal data
*
expected
Execution Error:
returned when internal processing is not possible:
Data out of (internal) range
*
Conflicting oscilloscope settings
*
Synchronization Error:
returned when the oscilloscope receives a new command while it is still executing
the previous one:
a new command is sent without waiting for the <acknowledge>
*
synchronization.
Communication Error:
returned when any framing, parity or overrun error occurs in the received data.
When an error is detected during the execution of the command:
-- the oscilloscope sends an <acknowledge>,
-- the oscilloscope terminates further execution of the command and returns
to the idle state,
-- the oscilloscope is then ready for a new command.
(ST query may give more info)
(ST query may give more info)
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