Instruction manual



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.

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 constants (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.

RS-422A

or RS-485

S

S

R

R

SW2

TERMINAL RESISTOR (1/2W, 120Ω)

SW2 ON/OFF SWITCH

SW1

SW2

PNP

NPN

OFF

12 13 14 R R

1 23 S S

P 2 R + R

P C S + S

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.

Notes: