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Appendix |ASCII Communication with Controller
confocalDT 24x1
Data structure of video signals:
Pixel 0
Pixel 2
... Pixel 511
Raw signal, 16 bit
Dark corrected signal, 16 bit
Light source corrected signal, 16 bit
Dark values table, 16 bit
Light values table, 16 bit
Peak threshold, 16 bit
Raw signal
Dark corrected signal
Light source corrected
signal
Dark values table
Light values table
Peak threshold
...
Raw signal
Dark corrected signal
Light source corrected
signal
Dark values table
Light values table
Peak threshold
A 5.6.2 Exposure Time
The data word to the exposure time is 32-bit wide during transmission via Ethernet. The
resolution is 25 ns, in addition informations according to table 5-1 are transmitted.
Bit position
Description
0 up to 19
Exposure time in 25 ns steps
20 up to 27
Reserved (can be non-zero)
28 up to 31
Frame rate
Bits
Measuring rate
Max. exposure time [μs]
0
70 kHz
14.275
1
50 kHz
20
2
25 kHz
40
3
10 kHz
100
4
5 kHz
200
5
2.5 kHz
400
6
1 kHz
1000
7
0.3 kHz
3333.25
8
0.2 kHz
5000
9
0.1 kHz
10000
14
manual measuring rate
1/f
15
auotmatic mode
...
Fig. 80 Table exposure time
-
IFC2471: 0.3 kHz; 1 kHz; 2.5 kHz; 5 kHz; 10 kHz; 25 kHz; 50 kHz and 70 kHz
-
IFC2471LED: 0.1 kHz; 1 kHz; 2.5 kHz; 5 kHz; 10 kHz; 25 kHz; 50 kHz and 70 kHz
-
IFC2461: 0.1 kHz; 0.2 kHz; 0.3 kHz; 1 kHz; 2.5 kHz; 5 kHz, 10 kHz, 25 kHz
-
IFC2451: 0.1 kHz; 0.2 kHz; 0.3 kHz; 1 kHz; 2.5 kHz; 5 kHz; 10 kHz
The output of the exposure time via the RS422 interface is effected by a resolution of
100 ns. For that the data word is 18 bits wide. The bits 9 up to 2 of the 32 bit data word
are output by Ethernet.
A 5.6.3 Measuring rate
The generated measuring rate from the controller or the measured rate of the SyncIn
signal with Slave Sync operation mode.
RS422, 18 bit unsigned integer: Measuring rate = 20 000 000 / value
Ethernet, 32 bit unsigned integer: Measuring rate = 40 000 000 / value
A 5.6.4 Encoder
The encoder values for transmission can be selected individually. A 32 bit data word
(unsigned integer) with the encoder position is output via Ethernet. Only the lower 18 bits
of the encoder values are transmitted by the transmission via RS422.
A 5.6.5 Measured Value Counter
The transmission of the measured value counter via Ethernet is effected as 32 bit value
(unsigned integer). On the RS422 interface, only the lower 18 bits of the profile counter
