WEG CFW100 Programming Manual page 87

I/O
0 to 10 V
0 to 20 mA
4 to 20 mA
10 to 0 V
20 to 0 mA
20 to 4 mA
For example: AIx = 5 V, offset = -70.0 %, gain = 1.000, with signal of 0 to 10 V, that is, AIx
(
5
AIx(%) = x (100.0 %) + (-70 %)
10
Another example: AIx = 12 mA, offset = -80.0 %, gain = 1.000, with signal of 4 to 20 mA, that is, AIx
AIx = 16.
FE
(
12 - 4
AIx(%) = x (100.0 %) + (-80 %)
16
9
AIx = -30.0 % means that the motor will spin forward with a reference in module equal to 30.0 % of P134, if the
signal AIx function is "Frequency Reference".
In the case of filter parameters (P235), the value set corresponds to the time constant used to filter the input signal
read. Therefore, the filter response time is around three times the value of this time constant.
P234 - AI1 Input Offset
P239 - AI2 Input Offset
Range:
Description:
The parameters define the offsets of the analog inputs.
Each analog input of the inverter is defined by the steps of calculation of Signal, Offset, Gain, Filter, Function and
Value AIx, as shown in
P235 - AI1 Input Filter
9-4 | Micro Mini Drives
Table 9.1: Alx configuration and equation
Signal P233 or P238
0 AIx(%) =
0 AIx(%) =
1 AIx(%) =
2 AIx(%) = 100 % -
2 AIx(%) = 100 % -
3 AIx(%) = 100 % -
)
x 1.000 = -20.0 %
)
x 1.000 = -30.0 %
-100.0 to 100.0 %
Figure 9.1 on page 9-1.
Equation AIx(%)
( )
AIx(V)
x (100,0 %) + offset x gain
10 V
( )
AIx(mA)
x (100,0 %) + offset
20 mA
(
AIx(mA) - 4 mA
x (100,0 %) + offset
16 mA
(
AIx(V)
x (100,0 %) + offset
10 V
(
AIx(mA)
x (100,0 %) + offset
20 mA
(
AIx(mA) - 4 mA
x (100,0 %) + offset
16 mA
x gain
)
x gain
)
x gain
)
x gain
)
x gain
= 0 and AIx
ini FE
ini
= 10.
= 4 and