WEG CFW300 V1.3X, Programming Manual

Page: 109 / 157

Digital and Analog Inputs and Outputs
CFW300 | 12-17
12
i) ELECTRONIC POTENTIOMETER (E.P.)
The E.P. function enables the setting of the speed via digital inputs programmed for Accelerate E.P. and Decelerate
E.P. The basic principle of this function is similar to the sound volume and intensity control of electronic appliances.
The operation of the E.P. function is also affected by the behavior of parameter P120, that is, if P120 = 0 the E.P.
reference initial value will be P133; if P120 = 1 the initial value will be the last reference value before the disabling
of the inverter, and if P120 = 2, the initial value will be the reference via P121 keys.
DIx - Run/Stop
DIx - Decelerate
DIx - Decelerate
Time
Time
Reset
Reset
P133
&
Reference
Time
Inactive
Inactive
Active
Active
Output
frequency
RAMP
Enabling (RUN)
Time
Active
Inactive
DIx - Accelerate
DIx - Accelerate
Figure 12.12: Example of the Electronic Potentiometer (E.P.) function
j) MULTISPEED
The Multispeed reference, as described in Item 7.2.3 Parameters for Frequency Reference on page 7-8 , enables,
by means of the combination of up to three digital inputs, the selection of one from eight reference levels predefined
in parameters P124 to P131. For further details, refer to
Chapter 7 LOGICAL COMMAND AND FREQUENCY
REFERENCE on page 7-1 .