750-563 [2 AO 0/4-20mA / 6-18V DC 16 Bit] • 15
Process Image
WAGO-I/O-SYSTEM 750
I/O Modules
Numeric formats
Display
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 limit value depending on the numeric
format:
In the +/- numeric ranges, the limit values must be re-calculated to a positive
equivalent in the range from 0 ... 65535 (see table).
1. Example: twos complement
Lower limit: -10 -> underrange limit value (register 41): 32758
Upper limit: +10 -> overrange limit value (register 42): 32778
2. Example: leading sign/amount
Lower limit: -10 -> underrange limit value (register 41): 32758
Upper limit: +10 -> overrange limit value (register 42): 32778
Setting the upper and lower limit value depending on a scaling:
3. Example: scaling
–10000 should correspond to –10 V, +10000 should correspond to +10 V.
This way, the scaling factor is: 32767 / 10000 = 3,2767.
3,2767 * 256 (increment with scaling) = 839.
839 is the amplification factor (gain, register 34). The offset (register 33)
remains 0.
If limit values should now be determined, these must be multiplied by 3.2767
and then re-calculated as in the first example to a numeric equivalent in the
range from 0 ... 65535.
