28
TA2
TB2
TC2
220VAC
TA2
TB2
TC2
24VDC
2-4-4. Communication terminal wiring
The communication interface provided by frequency converter is standard RS485 communication.
The following wiring methods can form a single master single slave or single master multi slave control system.
Using the software of upper computer (PC or PLC controller) can realize the real-time monitoring of the
inverter in the industrial control system, and realize the complex operation control functions such as remote and
high automation.
(1) The connection between VFD RS485 port and upper computer
(2) Multiple inverters can be connected together through RS485 and controlled by PLC (or upper
computer), as shown in the figure. With the increase of the number of connections, the
communication system is easy to interference. It is suggested that the following wiring methods be
adopted:
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