Product description
38 © SICK AG · Germany · All rights reserved · Subject to change without notice 8012471/ZN27/2017-06-09
Operating Instructions
LMS1xx Laser Measurement Sensors
Chapter 3
3. Start continuous measured value output
The scan data are output until measured value output is ended.
Request
<STX>sEN LMDscandata 1<ETX>
LMS1xx confirmation
<STX>sEA LMDscandata 1<ETX>
LMS1xx answer
<STX>sSN LMDscandata [contents]<ETX>
4. Stop continuous measured value output
Request
<STX>sEN LMDscandata 0<ETX>
LMS1xx confirmation
<STX>sEA LMDscandata 0<ETX>
3.8.4 Measured value output for a second reflected pulse
The LMS1xx also measures a second reflected pulse, if it is produced, and outputs its meas-
ured value in the measured value telegram. A second reflected pulse can be produced, e.g.,
if the LMS1xx hits a rain drop first. This will reflect part of the energy (1st reflected pulse).
The other part of the beam continues to propagate and is reflected by the actual object (2nd
reflected pulse).
Fig. 23: Principle of operation of the measurement of the second reflected pulse
Important The function can only be used in measurement applications, not in the field application.
The time after the first reflected pulse from which measurement can be performed with
full accuracy is dependent on the target that reflected the first reflected pulse.
An application in the host connected can then, for instance, take into account the 2nd re-
flected pulse for the measurement and ignore the first reflected pulse. In bad weather (rain/
snow), this procedure can produce better results or actually make possible special applica
-
tions such as measurement through a window (e.g. in an ATEX environment).
Send pulse
Reflected pulse
1
2
t
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