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Control Menu, Set Sensor Parameter
optoNCDT 2300
The measuring rate defines the number of measurements performed by the sensor per second.
i
Synchronized sensors must always be set to the same measuring rate. Use a high measuring rate for light colored and matt
objects to be measured. Use a low measuring rate for dark or shiny objects to be measured (e.g. surfaces covered in black
lacquer), for better measurement results.
At a maximum measuring rate of 49.140 kHz the CMOS element is exposed 49.140 times per second.
The lower the measuring rate, the longer the maximum exposure time. The real-time control of the sensor reduces the exposure time
in dependency on the amount of light hitting the CMOS element and therefore compensates for reflection changes at the same time,
e.g. caused by imprints on the surface of the object being measured.
The output rate gives the actual number of measurement values at the sensor output per second. The maximum output rate can never
exceed the measuring rate.
7.4.3 Baud Rate for RS422
To detect a data loss on the receiver side, the sensor sends in this case a runtime error. If not all data can be output via RS422, error
codes are issued in the next record.
No trigger, no synchronization set
Calculation of the output rate using the RS422 serial interface:
BR > 33 * MR * m / ODR Abbreviations used
BR
MR
ODR
m
Baud rate set on sensor and on the other side [kBaud]
Measuring rate [kHz]
Output data rate
Number of values to transfer (measuring value + additionally selected value e.g intensity),
see Chap. 9.1.1
The factor 33 means that per value transmitted 3 bytes are transmitted, with real 11 bit are used on
he serial line.
Fig. 31 Equation 1, dimensioning of the baud rate without trigger, no synchronization
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