B2

Introduction

Appendix B

X200 Series inverters have built-in RS-485 serial communications, featuring the ModBus RTU protocol. The inverters can connect directly to existing factory networks or work with new networked applications, without any extra interface equipment. The specifications for X200 serial communications are in the following table.

Item

Specifications

User-selectable

Transmission speed

4800 / 9600 / 19200 bps

9

Communication mode

Asynchronous

 

Character code

Binary

 

LSB placement

Transmits LSB first

 

Electrical interface

RS-485 differential transceiver

 

Data bits

8-bit (ModBus RTU mode)

(ASCII mode not

available)

 

 

Parity

None / even / odd

9

Stop bits

1 or 2 bits

9

Startup convention

One-way start from host device

 

Wait time for response

0 to 1000 msec.

9

Connections

Station address numbers from 1 to 32

9

Connector

RS45 modular jack

Error check

Overrun, Fleming block check code,

CRC-16, or horizontal parity

 

 

The network diagram below shows a series of inverters communicating with a host computer. each inverter must have a unique address, from 1 to 32, on the network. In a typical application, a host computer or controller is the master and each of the inverter(s) or other devices is a slave.

1

2

32

X200X200X200

Page 229
Image 229
Hitachi X200 Series instruction manual Introduction, Specifications