WAGO I/O-SYSTEM 750 Manual page 10

10 • 750-562 [2 AO 0/+-10V DC 16 Bit]
Process Image
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.
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