Reference Frequency; Limits For Frequency Reference - WEG CFW100 Programming Manual

Logical Command and Speed Reference
P225 – JOG Selection – LOCAL Situation
P228 – JOG Selection – REMOTE Situation
Adjustable
Range:
Properties:
Description:
These parameters define the origin source for the JOG function in the Local and Remote situation. The JOG
function means a Run/Stop command added to the reference defined by P122; see
Reference Frequency on page

7.2 REFERENCE FREQUENCY

The frequency reference is the value applied to the input of the acceleration ramp module (P001) to control the
frequency applied to the inverter output (P002) and consequently the motor shaft speed.
7
Inside the CPU, the inverter uses signed 16 bit variables to treat the frequency references. Besides, the full scale of
the reference, output frequency and related variables are defined in 500.0 Hz. On the other hand, depending
on the source, this scale is conveniently modified considering the interface with the user by standardization or
application requirements.
In general, the digital references defined by parameters such as: HMI keys (P121), Multispeed (P124 to P131) and
E.P. have a scale from 0.0 to 300.0 Hz with resolution of 0.1 Hz.
In digital inputs (DIx), on the other hand, the reference is defined according to the function predefined for P263
to P266.
The frequency reference via analog inputs and frequency input is according to the signal, gain and offset parameters
P230 to P250. The full scale of the reference is always by P134, that is, maximum value in AIx is equivalent to the
frequency reference equal to P134.
The digital references Serial/USB, CANopen, DeviceNet and SoftPLC act on a standardized scale called "13-bit
speed", where the value 8192 (213) ) is equivalent to the motor rated frequency (P403). Those references are
accessed by parameters P683 and P685.
The digital references, though, have a different scale and the frequency reference parameters with their range from
0.0 to 300.0 Hz, according to previous descriptions. The frequency value on the ramp input (P001) is always limited
by P133 and P134. For example, the JOG reference is given by P122, this parameter may be set in up to 300.0 Hz,
but the value applied to the ramp input as reference will be limited by P134 when the function is executed.
Analog inputs (AIx)
Communication networks and SoftPLC

7.2.1 Limits for Frequency Reference

Although the parameters to adjust the reference have a wide range of values (0 to 300.0 Hz), the value applied
to the ramp is limited by P133 and P134. Therefore, the values in module out of this range will have no effect on
the reference.
7-6 | CFW100
0 = Disabled
1 = Not Used
2 = DIx
3 = Serial/USB
4 = Not Used
5 = CO/DN
6 = SoftPLC
cfg
7-7.
Table 7.1: Summary of the scales and resolutions of the frequency references
Reference
HMI parameter
Full Scale
-P134 to P134
-300.0 Hz to 300.0 Hz
-300.0 Hz to 300.0 Hz
Return Advance
Factory P225 = 1
Setting: P228 = 1
item 7.2.3 Parameters for
Resolution
10 bits or (P134/1024)
Speed 13 Bits (P403/8192)
0.1 Hz