Speed Reference - WEG CFW501 V1.8X Programming Manual

P0225 – JOG Selection – LOCAL Situation
P0228 – JOG Selection – REMOTE Situation
Adjustable 0 = Inactive
Range:
1 = HMI Keys
2 = DIx
3 = Serial / USB
4 = SoftPLC
Properties: cfg
Access groups I/O
via HMI:
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 P0122 – see
Parameters on page 7-9.

7.2 SPEED REFERENCE

The speed reference is the value applied to the input of the acceleration ramp module (P0001) to control the
frequency control applied to the inverter output (P0002) and consequently the motor shaft speed.
Internally, the inverter CPU uses 16-bit variables with signal to treat the speed references. Besides, the full scale
of the reference, output frequency and related variables is defined in 1800 rpm. 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 (P0121), and JOG have a scale from 0
to 18000 rpm with resolution of 1 rpm. On the other hand, the reference via analog input uses the 16-bit internal
scale with signal with a full scale in 18000 rpm and resolution of 0.55 rpm.
The speed reference via HMI can be the JOG key of the keys "
In digital inputs (DIx), on the other hand, the reference is defined according to the function predefined for P0263
to P0270.
The speed reference via analog inputs and frequency input is according to the signal, gain and offset parameters
P0230 to P0250. The full scale of the reference is always by P0134, that is, maximum value in AIx is equivalent to
the speed reference equal to P0134.
The digital references Serial/USB and SoftPLC act on a standardized scale called "13-bit Speed", where the
value 8192 (213) is equivalent to the motor rated frequency given by P0403. Those references are accessed by
parameter P0683 and system marker of the SoftPLC, respectively.
Although the digital references have a different scale and speed reference parameters with their range from 0 to
18000 rpm, as previously informed, the speed value on the ramp input (P0001) is always limited by P0133 and
P0134. For example, the JOG reference is given by P0122; this parameter may be set to up to 18000 rpm, but
the value applied to the ramp input as reference will be limited by P0134 when the function is executed.
Table 7.1: Summary of the scales and resolutions of the speed references
Reference
Analog inputs (AIx)
Communication networks and SoftPLC
HMI Parameters
Logical Command and Speed Reference
" and "
Full Scale
- P0134 to P0134
-18000 rpm to 18000 rpm
-18000 rpm to 18000 rpm
Factory P0225 = 1
Setting:
P0228 = 2
item 7.2.3 Speed Reference
" on parameter P0121.
Resolution
10 bits or (P0134 / 1024)
Speed 13 Bits (P0403 / 8192)
1 rpm
CFW501 | 7-7
7