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Modbus Communication

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ASDA-A3

9

9.1 RS-485 communication interface (hardware)

The ASDA-A3 series servo drive supports RS-485 serial communication that you can use to

access and change the parameters of the servo system. See the following description of the

wiring:

Note:

1. The cable length can be up to 100 meters when the servo drive is installed in a quiet environment.

If the transmission speed is over 38,400 bps, a 15-meter cable is recommended to ensure data

transmission accuracy.

2. The numbers (4 and 5) on the preceding figure represent the pin number of each connector.

3. Use 12 VDC for the power supply.

4. When using RS-485 communication, you may connect up to 32 servo drives. Install a repeater to

connect more servo drives (the maximum is 127 stations).

5. Refer to Wiring for the CN3 connector in Chapter 3.

9-2

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