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Control Menu, Set Sensor Parameter
optoNCDT 2300
The measurement value output rate in trigger mode can be controlled with the edge as well as the level of the trigger signal. Imple-
mented trigger conditions:
Level triggering with high level / low level. Continuous
measurement output, as long as the selected level is applied.
Then stops the data output. The pulse duration must be at
least one cycle time. The subsequent break must also be at
least one cycle time.
U
I
D
0
t
t
Fig. 37 Low trigger level (above) and digital output signal (below)
Edge triggering with rising or falling edge. After the trigger
event the sensor outputs the preset number of measurement
values or starts a continuous measurement value output. The
pulse duration must be 5 µs at least.
U
I
D
0
t
t
Fig. 38 Trigger edge LH (above) and digital output signal
Software triggering. Starts the measurement value out-
put, when a software command comes. The trigger time is
defined more inaccurately. After the trigger event the sensor
outputs the preset number of measurement values or starts
a continuous measurement value output. If “0“ is selected
for the number of measurement values, the sensor stops the
triggering and the continuous value output.
The required signal levels comply to the EIA-422 specification. so that only driver circuits with RS422 output are recommended for trig-
gering. The difference between both input signals Trig+ (pin 5) and Trig- (pin 6) must be according to amount greater than 400 mV.
The sensor detects a high level, if the voltage on Trig+ is greater than on Trig-. The optoNCDT 2300 contains a terminating resistor
between pin 5 and 6 for line matching which can be connected via ASCII command.
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