6-48
LaserSpeed Pro 8500-4 Instruction Handbook: RS-232/RS-422 Communication
Note: To disable the Material Present feature and have Material Present on all the time, set the Ma-
terial Present Input Mode to External Active Low and leave the Material Present input disconnected.
F
Material Present Dropout Time
F<CR>
Read
Response Format:
<N>
F<N><CR>
Set
Factory Default: 50 Minimum: 0 Maximum: 511
<N>
is an integer specifying the Material Present Dropout Time in milliseconds.
If you are taking measurements and the Material Present signal is lost for less than the selected
Material Present dropout time, the loss is considered to be a momentary loss of signal and is ig-
nored. If the signal is lost for longer than the selected Material Present dropout time, it is consid-
ered to be end of the material. This function is very useful when making length measurements on
poor reflecting material.
G
Material Present Validation Time
G<CR>
Read
Response Format:
<N>
G<N><CR>
Set
Factory Default: 250
Minimum: 0 Maximum: 511
<N>
is an integer specifying the Material Present Validation Time Limit in milliseconds.
When material enters the measurement volume, the system determines the time between the Mate-
rial Present signal and the first valid data. If the time is less than or equal to the validation time
limit (selectable via LaserTrak or the G command), then the start-up length-correction is calculated
and a length measurement is initialized. If the time between the Material Present signal and the
first valid velocity data is longer than the validation limit, then the length calculation is aborted and
an error or fault is sent. This error is signalled by setting the length output in
Final Length Mode
output to a value of all 9’s.
M
Material Present Threshold Level
M<CR>
Read
Response Format:
<N>
M<N><CR>
Set
Factory Default: 2000
Minimum: 0 Maximum: 4095
Summary of Contents for BETA LaserMike LaserSpeed Pro 8500-4
Page 8: ...iv LaserSpeed Pro 8500 4 Instruction Handbook Caution LS8500 4E Labels LS8500 4X Labels ...
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