9-1
CHAPTER 9 - RS485 COMMUNICATION
9.1 Introduction
Inverter can be controlled and monitored by the sequence program of the PLC or other master module.
Drives or other slave devices may be connected in a multi-drop fashion on the RS-485 network and may be
monitored or controlled by a single PLC or PC. Parameter setting and change are available through PC.
9.1.1 Features
Inverter can be easily applied for Factory automation because Operation and monitoring is available by User-
program.
* Parameter change and monitoring is available via computer.
(Ex: Accel/Decel time, Freq. Command etc.)
* Interface type of RS485 reference:
1) Allows the drive to communicate with any other computers.
2) Allows connection of up to 31 drives with multi-drop link system.
3) Noise-resistant interface.
9.1.2 Connection guide for RS485 communication with PC , PLC and RS232/485
* REPEATER is not a required item but helps communication in long-distance communication or high noise
environment.
9.1.3 Before installation
Before installation and operation, this should be read thoroughly. If not, it can cause personal injury or damage
to other equipment.
PC
Inverter
#1
Inverter
#2
Inverter
#n
RS232/485
Converter
Repeater
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