Product description
36 © SICK AG · Germany · All rights reserved · Subject to change without notice 8013796/ZM63/2017-05-09
Operating Instructions
LMS5xx Laser Measurement Sensors
Chapter 3
5. Start continuous measured value output
The scan data are output until measured value output is ended.
Request
<STX>sEN LMDscandata 1<ETX>
LMS5xx confirmation
<STX>sEA LMDscandata 1<ETX>
LMS5xx answer continuously
<STX>sSN LMDscandata<ETX>
6. Stop continuous measured value output
Request
<STX>sEN LMDscandata 0<ETX>
LMS5xx confirmation
<STX>sEA LMDscandata 0<ETX>
3.9.4 Measured value output for a pulse reflected with multiple echoes
The LMS5xx Lite series can measure up to 2, the LMS5xx PRO/Heavy Duty up to 5 reflected
pulses (echoes). The measured values can be output in the measured value telegram or
used in the field application according to the echo filter settings (see section 3.9.2 “Filter”
on page 33). Several echoes can be produced, e.g. if the LMS5xx sender pulse hits several
rain drops, fog, glass, etc. These conditions can reflect part of the energy hence creating
reflected pulses or echoes. Most of the sending pulse energy will continue to propagate and
will eventually reflect against the actual target object. The LMS5xx PRO/Heavy Duty is able
to evaluate up to 5 received echoes.
Fig. 19: Principle of operation of the measurement of the fifth received echo (LMS5xx PRO/Heavy
Duty)
If the echo filter is set to FIRST ECHO, the LMS5xx will only take the first echo into account
and ignore all following echoes.
With A
LL ECHOES the sensor will receive up to 2 (Lite) or even 5 (PRO/Heavy Duty) echoes. It
will display all of them in the SOPAS monitor function and output all echo values received in
the measured value telegram (no values will be displayed as 0).
With the L
AST ECHO setting, the LMS5xx will also receive up to 2 or 5 echoes, however it will
only display the last echo received and ignore all previous echoes. In the measured value
telegram it will output only one value.
Send pulse
Received echos
t
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