WEG CFW300 V1.3X, Руководство по программированию

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Logical Command and Speed Reference
CFW300 | 7-11
7
DIx - Accelerate
DIx - Accelerate
Enabling (RUN)
Reset
Reset
Ramp
&
Reference
DIx - Decelerate
DIx - Decelerate
DIx - Run/Stop
Time
Time
Time
Time
Inactive
Inactive
Inactive
Active
Active
Active
Output frequency
P133
Figure 7.4: Operating graph of the E.P. function
7.2.5 Frequency Input FI
The behaviors of the analog input and frequency input are described in details in Section 12.4 FREQUENCY INPUT
on page 12-9 . 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 FREQUENCY REFERENCE
on page 7-1 .
7.2.6 "13-Bit Speed" Reference
The 13-bit Frequency Reference is a scale based on the motor rated speed (P402) or on the motor rated frequency
(P403). In the CFW300, parameter P403 is taken as the base to determine the frequency reference.
Thus, the 13-bit frequency value has a range of 16 bits with signal, that is, -32768 to 32767; however, the rated
frequency in P403 is equivalent to the value 8192. Therefore, the maximum value in the range 32767 is equivalent
to four times P403.
The 13-bit frequency reference is used in parameters P681 and P683, which are related to the interfaces with
communication (Serial/USB, CANopen, DeviceNet and Profibus DP) 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.