MICRO-EPSILON optoNCDT 2300 - Measurement Data Transmission to a Measurement Value Server, Measurement Value Block

Page 89
Digital Interfaces
optoNCDT 2300
8.2.3 Measurement Data Transmission to a Measurement Value Server, Measurement Value Block
Different measurement value frames are combined to a measurement value block and surrounded by another header. This header
gives information on the data contained and its length. The header (Byte sequence „Little Endian“) is mandatory at the beginning of a
UDP or TCP packet.
In case of measurement value data transmission to a measurement value server, the sensor sends each measurement value block to
the measurement value server or to a connected client after successful connection (TCP or UDP). Therefore no explicit requirement is
necessary.
By changes of the transmitted data or the frame rate a new header is sent automatically.
Preamble (32 bit)
Order number (32 bit)
Serial number (32 bit)
Flags 1 (32 bit)
Flags 2 (32 bit)
Frame number (16 bit) Bytes per frame (16 bit)
Counter (32 bit)
Fig. 44 Measurement value block header
Header registration Description
Preamble Identifies the header = 0x4D454153 /* MEAS */
Order number Order number of the sensor
Serial number Serial number of the sensor
Flags 1 Give information on the contents of the output values
Flags 2 Give information on the contents of the output values
Bytes per frame Number of bytes, that contain a measurement value frame
Frame number Number of frames, that cover this header
Counter Counter about the number of processed measurement values
Fig. 45 Inputs in the measurement value block header