WAGO-I/O-SYSTEM 750 XTR
Process Image 37
750-563/040-000 2AO 0/4-20mA/ 6-18V DC/ 16Bit /XTR
Manual
Version 1.3.0
Table 30: Number Formats
Number Formats
View
0 mA
4 mA
6 V
20 mA
20 mA
18 V
0 … 65535
0x0000
0
0x7FFF
32767
0x8000
32768
0xFFFF
65535
twos complement 0x8000
−
32768
0xFFFF
−
1
0x0001
0
0x7FFF
32767
Leading
sign/amount
0xFFFF
−
32767
0x8001
−
1 0x0001
0x7FFF
32767
Setting of the upper and lower limiting value depending on the numeric
format:
In the +/
−
numeric ranges, the limiting values must be re-calculated to a positive
equivalent in the range from 0 … 65535 (see table).
Example 1: Twos complement
Lower limit:
−10 → Underrange limiting value
: 32758
Upper limit: +10 → Overra
nge limiting value: 32778
Example 2: Leading sign/amount
Lower limit:
−10 → Underra
nge limiting value: 32758
Upper limit: +10 → Overra
nge limiting value: 32778
Setting the upper and lower limiting value depending on a scaling:
Example 3: Scaling
−
10000 should correspond to
−
10 V, +10000 could correspond to +10 V.
The scaling factor is: 32767 / 10000 = 3.2767.
3.2767 * 256 (increment with scaling) = 839.
839 is the gain factor (gain).
The offset remains 0.
If limiting values should now be determined, they must be multiplied by 3.2767
and then recalculated as in the first example to a numeric equivalent in the range
from 0 … 65535.
