WEG CFW500 V1.8X, Руководство по программированию, Страница: 68 / 172

Logical Command and Speed Reference
7-12 | CFW500
7
DIx - Accelerate
DIx - Accelerate
Enabling (RUN)
Reset
Reset
RAMP
&
Reference
DIx - Decelerate
DIx - Decelerate
Run/Stop
Time
Time
Time
Time
Inactive
Inactive
Inactive
Active
Active
Active
Output frequency
P0133
Figure 7.5: Operating graph of the E.P. function
7.2.5 Analog Input AIx and Frequency Input FI
The behaviors of the analog input and frequency input are described in details in Section 12.1 ANALOG INPUTS
on page 12-1 . Thus, after the proper signal treatment, it is applied to the ramp input according to the selection
of the reference described in Section 7.1 SELECTION FOR LOGICAL COMMAND AND SPEED REFERENCE on
page 7-1 .
7.2.6 13-Bit Speed Reference
The 13-bit speed reference is a scale based on the motor rated speed (P0402) or on the motor rated frequency
(P0403). In the CFW500, parameter P0403 is taken as the base to determine the speed reference. Thus, the
13-bit speed value has a range of 16 bits with signal, that is, -32768 to 32767; however, the rated frequency in
P0403 is equivalent to the value 8192. Therefore, the maximum value in the range 32767 is equivalent to four
times P0403.
The 13-bit speed reference is used in parameters P0681, P0683, P0685 and system markers for the SoftPLC,
which are related to the interfaces with communication networks and SoftPLC function of the product.
7.3 CONTROL WORD AND INVERTER STATUS
The inverter control word is the grouping of a set of bits to determine the commands received by the inverter from
an external source. On the other hand, the status word is another set of bits that define the inverter status. This
way, the control and status words establish an interface for the exchanging of information between the inverter
and an external module, such as a communication network or a controller.