LSIS sv-ig5a - CHAPTER 11 - RS485 COMMUNICATION; 11.2 RS485 Specification

11-1
CHAPTER 11 - RS485 COMMUNICATION
11.1 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.
 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.
Users can use any kind of RS232-485 converters. The specifications of converters depend on the
manufacturers. Refer to the converter manual for detailed specifications.
 Before installation
Before installation and operation, this should be read thoroughly. If not, it can cause personal injury
or damage to other equipment.
11.2 Specification
Item
Specification
Communication method
RS485
Transmission form
Bus method, Multi drop Link System
Applicable inverter
SV-iG5A series
Converter
RS232 converter
Connectable drives
Max 16
Transmission distance
Max. 1,200m (Within 700m Recommend)
Communication speed
19,200/9,600/4,800/2,400/1,200 bps selectable
Control procedure
Asynchronous communication system
Communication system
Half duplex system
Character system
ASCII (8 bit)
Stop bit length
Modbus-RTU: 2 bit LS Bus: 1 bit
Sum check
2 byte
Parity check
None
Installation
Use S+, S- terminals on control terminal block
Power supply
Use Insulated power from the inverter power supply
For Service Call 800-848-2504
For Service Call 800-848-2504