Calculating The Gain And Offset Of Analog Values - Siemens Logo! Manual

4.3.6 Calculating the gain and offset of analog val-
ues
A sensor is connected to the analog input and converts a
process variable into an electrical signal. This value of sig-
nal lies within the typical range of this sensor.
LOGO! always converts the electrical signals at the analog
input into digital values from 0 to 1000.
A voltage of 0 to 10 V at input AI is transformed internally
into range of values from 0 to 1000. An input voltage ex-
ceeding 10 V is shown as internal value 1000.
Because you can not always process the range of values
from 0 to 1000 as predetermined by LOGO!, you can multi-
ply the digital values by a gain factor and then shift the zero
of the range of values (offset). This allows you to output an
analog value to the LOGO! display, which is proportional to
the actual process variable.
Input voltage (in V)
Internal value
Gain
Offset
LOGO! Manual
A5E00380835-01
Parameter
LOGO! functions
Minimum Maximum
0
0
–10.00
–10000
≥ 10
1000
+10.00
+10000
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