WEG CFW300 V1.3X, Programming Manual

Page: 97 / 157

Digital and Analog Inputs and Outputs
CFW300 | 12-5
12
For example: AIx = 5 V, offset = -70.0 %, gain = 1.000, with signal of 0 to 10 V, that is, AIx
ini
= 0 and AIx
FE
= 10.
AIx(%) = x (100 %) + (-70 %) x 1 = -20.0 %
5
10
( (
Another example: AIx = 12 mA, offset = -80.0 %, gain = 1.000, with signal of 4 to 20 mA, that is, AIx
ini
= 4 and
AIx
FE
= 16.
AIx(%) = x (100 %) + (-80 %) x 1 = -30.0 %
12 - 4
16
( (
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.
12.2 NTC SENSOR INPUT
The CFW300-IOADR accessory has an exclusive analog input to connect an NTC sensor. The temperature reading
parameter is described below.
P375 - Value of the NTC Sensor
Adjustable
Range:
0 to 100 °C (32 °F to 212 °F)
Factory
Setting:
Properties: ro
Description:
This read-only parameter indicates the temperature value obtained from the NTC sensor.
For further details, refer to the installation, configuration and operation guide of the CFW300-IOADR IO's
Expansion Module.
NOTE!
When the NTC sensor is not connected to the accessory, the CFW300 frequency inverter will show
999 °C (1830 °F) in parameter P375. If pins 13 and 14 (accessory connector) are short circuited,
the value indicated in P375 will be 0 °C (32 °F).