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Baumer Electric AG
13.01.2021/
Frauenfeld, Switzerland
5.6
Histograms
Several diagnosis and process values are continuously tracked to allow predictive maintenance or trouble
shooting. Instead of storing each value, the values are stored in a histogram. Therefore the values are divided
into several intervals (bins). This allows a much more efficient way to store the values for analyzes.
Example based on Device Temperature:
-
Range:
-40 … +120°C
-
Number of Bins:
16 Bin
-
Size of a Bin:
160°C / 16 = 10 °C
-
Range of Bin 1:
-40 …. -30.00 °C
-
Range of Bin 2:
-20.00 … -10.00 °C
-
…
-
Range of Bin 16: +110.00 °C ... +120 °C
By extracting the related bins and information via IO-Link, it is possible to plot a histogram and get easily the
distribution of the values.
Histograms are available for
-
Device Temperature, Lifetime
-
Power Supply Voltage, Lifetime
-
Process Value 1: Distance, Resettable
Regarding Device Temperature and Power Supply Voltage, every 10 seconds a measurement is taken.
For the process values, every single measurement is considered.
Figure 28: Histogram Device Temperature over Lifetime, Example
The counts of each bin are stored as 32 bit value (up to 4’294’967’296 counts).
8
25
47
35
68
88
102
75
68
92
121
44
79
101
25
55
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
CO
UN
TS
BINS
HISTOGRAM DEVICE TEMPERATURE
OVER LIFETIME
Содержание IO-Link RR30
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