Digital Input - WEG CFW100 Programming Manual

Digital and Analog Inputs and Outputs
P247 – Input Gain in Frequency FI
Adjustable
Range:
P248 – Minimum Frequency Input FI
Adjustable
Range:
P249 – Input Offset in Frequency FI
Adjustable
Range:
P250 – Maximum Frequency Input FI
Adjustable
Range:
Properties:
Description:
Those parameters define the behavior of the frequency input according to the equation:
(
(
FI (Hz) - P248
FI =
P250 - P248
Parameters P248 and P250 determine the operation range of the frequency input (FI), while parameters P249 and
P247 determine the offset and gain, respectively. For example, FI = 2000 Hz, P248 = 1000 Hz, P250 = 3000 Hz,
P249 = -70.0 % and P247 = 1.000, thus:
(
(
2000 - 1000
FI =
3000 - 1000
The value FI = -20.0 % means that the motor will spin in the opposite direction with a reference in module equal
20.0 % of P134, with the function of the FI signal for "Frequency Reference" (P221 = 4).
When P246 = 1, the digital input DI3 is pre-defined for frequency input, regardless the value of P265, with
operating capacity in the band from 0 to 3000 Hz in 10 Vpp.
12
The time constant of the digital filter for the frequency input is defined by means of parameter P245.

12.5 DIGITAL INPUT

Below is a detailed description of the parameters for the digital inputs.
12-8 | CFW100
0.000 to 9.999
1 to 3000 Hz
-100.0 to 100.0 %
1 to 3000 Hz
(
(
x (100 %) + P249 x P247
(
(
x (100 %) - 70 % x 1.000 = 20.0 %
Return Advance
Factory
1.000
Setting:
Factory 100 Hz
Setting:
Factory 0.0 %
Setting:
Factory 1000 Hz
Setting: