WEG CFW501 V1.8X, Programming Manual, Page: 120 / 192

Digital and Analog Inputs and Outputs
12-12 | CFW501
12
P0247 – Input Gain in Frequency FI
Adjustable
Range:
0.000 to 9.999
Factory
Setting:
1.000
P0248 – Minimum Frequency Input FI
Adjustable
Range:
10 to 20000 Hz
Factory
Setting:
10 Hz
P0249 – Input Offset in Frequency FI
Adjustable
Range:
-100.0 to 100.0 % Factory
Setting:
0.0 %
P0250 – Maximum Frequency Input FI
Adjustable
Range:
10 to 20000 Hz Factory
Setting:
10000 Hz
Properties:
Access groups
via HMI:
I/O
Description:
Those parameters define the behavior of the frequency input according to the equation:
FI = x (100 %) + P0249 x P0247
FI(Hz) – P0248
P0250 – P0248
(
( (
(
Parameters P0248 and P0250 determine the operation range of the frequency input(FI), while parameters
P0249 and P0247 for offset and gain, respectively. For example, FI = 5000 Hz, P0248 = 10 Hz, P0250 = 10000 Hz,
P0249 = –70.0 % and P0247 = 1.000, thus:
FI = x (100 %) – 70 % x 1.000 = 20.05 %
5000 – 10
10000 – 10
(
(
(
(
The FI value = –20.05 % means that the motor will spin in the opposite direction with a module reference equal to
20.0 % of P0134 if the FI signal function is selected as Speed Reference (P0221 = 8 and/or P0222 = 8).
When P0246 = 1, the digital input DI2 is pre-defined for frequency input, regardless the value of P0264, with
operating capacity in the band from 10 to 20.000 Hz in 10Vpp.
The time constant of the digital filter for the frequency input is shared with the analog input AI3 through
parameter P0245.