B&B Electronics ADAM-6066 - Manual - Manual (Page 188)

ADAM-6000 Series User Manual 178
physical unit value (we call it engineer unit value) and there is linear rela-
tionship between the voltage (or current) value and the engineer unit
value. For example, the current and the engineer unit value have linear
relationship as shown below:
Figure 7.4: Engineer Unit and Current Value
ADAM-6000 analog input module features Scaling function to convert
the voltage (or current) value to the engineer unit value. For example,
that’s say the condition is if the pressure value is more than or equal to 2.5
kg/cm
2
. Without scaling function, you need to convert the pressure value
(2.5 kg/cm
2
) to the current value (8 mA). Then you enter the current
value 8 mA in the Value text box of the Operation area to define the con-
dition.
Actually, you don’t need to transfer the pressure value to current value by
yourself. You can enable the scaling function by clicking the Scaling
check box in the Operation area. Then enter the minimum and maximum
value for the engineer unit in the Min and Max text box of the Scale to
item, to build relationship between the voltage (or current) value and the
engineer unit value. For example here, you should enter 0 and 10 as the
minimum and maximum pressure value. Since ADAM-6000 module can
automatically transfer the pressure value to the current value, you just
need to enter the pressure value, 2.5 kg/cm
2
, into the Value text box to
define the condition. The configuration window should looks like Figure
7.5 below. This functionality can help you to configure the condition
more intuitively.
Pressure (kg/cm 2 )
Current (mA)
20 4
10
Pressure (kg/cm 2 ) = 0.625 x [ Current (mA) – 4 ]