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E6580757
F-56
6
■ Example of connection for RS485-communication
<Independent communication>
Perform computer-inverter connection as follows to send operation frequency commands from the host
computer to inverter No. 3:
Given away
Wiring
Data (host → INV)
Response data (INV → host)
Host computer
Given away
Given away
Given away
Given away
"Given away": Only the inverter with the selected inverter number conducts data processing. All other
inverters, even if they have received the data, give it away and stand by to receive the
next data.
* : Use the terminal board to branch the cable.
(1) Data is sent from the host computer.
(2) Data from the computer is received at each inverter and the inverter numbers are checked.
(3) The command is decoded and processed only by the inverter with the selected inverter number.
(4) The selected inverter responds by sending the processing results, together with its own inverter
number, to the host computer.
(5) As a result, only the selected inverter starts operating in accordance with the operation frequency
command by communicating independently.