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Operation
optoNCDT 1420
By displaying the video signal, you can detect effect of the adjustable measurement task (target material),
choice of peak and possible interfering signals by means of reflections.
There is no linear relationship between the position of the peaks in the video signal and the output measure-
ment value.
6.3
Programming via ASCII Commands
As an added feature you can program the sensor via an ASCII interface, physically the RS422. This requires,
that the sensor must be connected either to a serial RS422 interface via a suitable interface converter, see
Chap.
, or a plug-in-card to a PC / PLC.
Pay attention in the programs used to the correct RS422 default setting.
Once connected, you can transmit the commands from the appendix, see Chap.
sensor.
6.4
Timing, Measurement Value Flux
The sensor requires three cycles for measurement and calculation without triggering:
Each cycle takes 250 µs at a measuring rate of 4 kHz. The measured value N is available at the output after
three cycles. The delay between acquisition and output is therefore 750 µs. As the processing in the cycles
occurs parallel, after another 250 µs, the next measured value (N+1) is output.
Summary of Contents for ILD 1420-10
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