SV-iS7 User Manual - Inverter Drive Supermarket

Chapter 11 Communication Function
11-2
11.1.2 Specifications
Category Specifications
Communication method RS-485
Transfer form Bus type, Multi drop Link System
Inverter series SV-iS7 series
Converter Embedded with RS-232
Number of connected
inverters
Max. 16
Transfer distance Max. 1,200m (recommend within 700m)
Recommended cable for
communication
0.75mm 2 (18AWG), Shield Type Twisted-Pare Wire
Installation form Connect to S+,S-, CM of the terminal block
Communication Power
Use the power that are insulated from the inner part of inverter as
communication power(supplied from inverter)
Communication Speed Select out of 1,200/2,400/9,600/19,200/38,400 bps
Control procedure Unsynchronized communication system
Communication system Half duplex system
Letter system Modbus-RTU: BINARY LS Bus: ASCII
Stop bit length 1 bit/2 bit
Sum check 2 byte
Parity check None/Even/Odd
11.1.3 Composition of communication system
PC
RS-485 terminal connection: connect to S+, S- of the terminal block (see Chapter 4 Wiring)
Number of connectable inverters: up to 16 units
Number of extendable addresses(St ID):1~250
Length of effective communication lines: possibly 1200m in total. Keep it below 700m for stable communication.
Please use communication Repeater to enhance the communication speed if you have to use communication cable
above 1200m or to connect additional inverter. It is effective to reduce the noise influence from communication by
environment.
RS-232/485
Converter
Inverter.#1
Inverter.#2
Inverter.#n