The User Manual of 580 Series General Frequency Converter


Start and stop control of the communication



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580 Manual EV1.0 中性最终版20140630

4.7.1.3 Start and stop control of the communication

The application in where the operation of frequency converter is controlled by the upper computer via communication mode gets more and more increased, for instance, the communication is available by means of RS485 and frequency converter. The function code of Communication reference is shown as the following figure:



Fig. 4-7 The example of start and stop control mode of the communication

In the figure above, the function code (Fd-04) of communication time out is set to a nonzero value, that is to say, the automatic stop of frequency converter due to communication timeout failure is enabled so as to prevent that the frequency converter is out of control due to communication cable failure or the failure of upper computer. This function can be enabled in some application situations. MODBUS-RTU slave station protocol is built in the communication port of frequency converter and the upper computer must make use of MODBUS-RTU master station protocol for relevant communication. See the appendixes in the manual and RS485 communication expansion card for the specific definition of communication protocol.


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