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Digital Interfaces
optoNCDT 2300
8.2.4 Ethernet Video Signal Transmission
The video signal is effected analogously to the data transmission to a measurement value server via Ethernet, except that only one
raw signal or one filtered signal or one raw signal and one filtered signal is transmitted in a measurement value block, and each video
signal transmission must be requested separately. This measurement value block can span multiple TCP / IP or UDP / IP packets
depending on the size of the video signal. The preamble for the video signals is 0x56494445 / * VIDE * /.
8.3 RS422
The interface RS422 has a maximum baud rate of 4000 kBaud. The factory-set baud rate is 691.2 kBaud. The measuring rate is maxi-
mum 49,140 kHz.
Data format: Measurement values in binary format, commands as an ASCII string.
Interface parameter: 8 Data bits, no parity, one stop bit (8N1).
i
Disconnect or connect the D-sub connection between RS422 and USB converter when the sensor is disconnected from power
supply only.
Measurement data format
16 Bit
1
are transmitted per output value. An output value is divided into three bytes that differ in the two most significant bits. The
transmission of additional output values is optional.
Output value 1 / additional:
L-Byte 0 0 D5 D4 D3 D2 D1 D0
M-Byte 0 1 D11 D10 D9 D8 D7 D6
H-Byte 1 0
2
0
3
0
3
D15 D14 D13 D12
1, 3) Displacement and difference values are converted with a value range of 18 bits for the measurement setup “direct reflection” for
measurements on targets with a refractive index greater than 1, maximum 4. This means that also there are D16 and D17 in H-Byte.
Other values are converted with 16 bits.
2) Bit 7 in the H byte is set to 0 for the last output value. This simultaneously represents the identifier of a new block. With all previous
output values in the same block, the 7
th
is in the H byte 1. Depending on the measuring rate, baud rate and output data rate output
all data can be output in one block. If data output is not possible, a run-time error will be output. Use the command GETOUTINFO_
RS422 to query for data selection and output sequence.
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