Instruction manual

93
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Communications connection terminal
Use the following S+, S-, R+ and R- terminals for MEMOBUS communications.
Change the termination resistor as shown below.
At RS-422, RS-485 communications: Turn ON SW2 ON/OFF switch of only the
inverter at the termination viewed from the PLC.
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Procedure for communications with PLC
The following shows the procedure for communications with PLC.
(1) Connect the communication cable between the PLC and the VS-606V7 with the
power supply turned OFF.
(2) Turn the power ON.
(3) Set the parameters (n151 to n157) required for communication by using the digital
operator.
(4) Turn the power OFF once to verify that the digital operator displays have been
completely erased.
(5) Turn the power ON again.
(6) Communications with the PLC starts.
Notes: 1. Separate the wiring for communication from the
main circuit wiring or other power lines.
2. Use shielded cables for communication wiring;
connect the shielded sheath to the ground terminal
and terminate the other end to prevent it from being
connected (to prevent noise malfunction).
3. When communication is performed through
RS-485, connect S+ and R+, S- and R- terminals
outside the inverter as shown right side.