WEG CFW300 V1.3X, Programming Manual

Page: 47 / 157

Logical Command and Speed Reference
CFW300 | 7-1
7
7 LOGICAL COMMAND AND FREQUENCY REFERENCE
The drive of the electric motor connected to the inverter depends on the logical command and on the reference
defined by one of the several possible sources, such as: HMI keys, digital inputs (DIx), analog inputs (AIx), Serial/
USB interface, CANopen/DeviceNet interface, SoftPLC, etc.
The command via HMI is limited to a set of functions pre-defined for the keys according to Chapter 4 HMI AND
BASIC PROGRAMMING on page 4-1 , similarly to the digital inputs (DIx), with the functions implemented in
parameter P263 to P270. On the other hand, the command via digital interfaces, such as communication network
and SoftPLC, act directly on the inverter control word by means of control parameters and system markers of the
SoftPLC, respectively.
The frequency reference in turn is a numeric value in 16 bits with signal with scale in Hertz (Hz), a resolution of
0.1 Hz and full scale at 400.0 Hz.
7.1 SELECTION FOR LOGICAL COMMAND AND FREQUENCY REFERENCE
The inverter command and reference source is defined by the inverter parameters for two different situations: Local
and Remote, which can be switched dynamically during the inverter operation. Thus, for a certain parameterization,
the inverter has two sets for command and reference, according to block diagram of
Figure 7.1 on page 7-2 .
Parameter P220 determines the source of commands for Local and Remote situations.
Parameters P223, P224 and P225 define the commands in the Local situation; parameters P226, P227 and P228
define the commands in the Remote situation, and parameter P105 determines the source for selection between
1
st
and 2
nd
Ramp. This structure for the selection of the command source is shown in Figure 7.1 on page 7-2 .
Parameters P221 and P222 define the frequency reference in the Local and Remote situations.
This structure for the selection of the reference source is shown in Figure 7.2 on page 7-3 .