Omron FQ2-S Series User Manual page 270

Note
Set the data output to output measurement results.
If data output is not set, only the command response is output.
Setting the Data to Output Automatically after Measurements: p. 169
Execute Measurement
This command executes one measurement.
If data output is not set, only the measurement is performed.
If data output is set, the measurement is performed and the result is returned as response data.
<Command Format>
M E A S
<Response Format>
When the Command Is Processed Normally
O K CR
Measurement
CR
result
Delimiter
When the Command Is Not Processed Normally
E R CR
Delimiter
<Parameter Descriptions>
Measurement result
268
Command Control
or
U R E CR
Delimiter
The measurement result is output as the response when data output is set.
The measurement result is not output when data output is not set.
Setting the Data to Output Automatically after Measurements: p. 169
M CR
Delimiter
FQ2-S/CH User's Manual
for Communications Settings