Page 64
Appendix | Thickness Measurement
capaNCDT 6500
The measuring ranges are charged automatically in the controller with one another so
that the result is output correctly regardless of the measuring range of the output chan-
nel.
A 6.3
Data Format, Word Length
Ethernet
EtherCAT
Word length 24 bit
32 bit
Used word
length
21 bit; thus measuring values
greater than 100 % can be output
at math channels
24 bBit (if necessary, up to 32 bit)
Max. output
range
800 % * measuring range
25.600 % * measuring range
Example
Expected thickness value =
4.000 µm
min. measuring range = 500 µm
(= 1/8 of the max. expectancy
value)
Expected thickness value =
128.000 µm
min. measuring range = 500 µm
However, there are still a few things to consider:
i
The measuring values are stored only in channels, where there is also a demodu-
lator module. In case of empty channels, the measuring range is always set to a
default value of 10.000 µm after a restart. That means, here you should not enter
other measuring range, since otherwise the computed result is wrongly scaled after
a restart.
A 6.4
Set Math Functions
Change to menu
Settings > Math Functions.
Select the data channel on which the thickness value is to be output; in the example
here, this is data channel 3.
Enter the offset (distance between the two sensors to one another). In this example
here, the offset is 4.000 µm.
Give the value 1 as a factor for the measuring channel 1/2.
Confirm the input(s) with
Submit
.
Summary of Contents for capaNCDT 6500
Page 67: ......
