Network Protocol Reference - Hitachi WJ200-001S Instruction Manual

Wj200 series single/three-phase inputs 200v/400v class

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Table of Contents

Network Protocol Reference

Transmission procedure

The transmission between the external control equipment and the inverter takes the

procedure below.

 Query - A frame sent from the external control equipment to the inverter

 Response - A frame returned from inverter to the external control equipment

The inverter returns the response only after the inverter receives a query from the

external control equipment and does not output the response positively. Each frame is

formatted (with commands) as follows:

Frame Format

Header (silent interval)

Slave address

Function code

Trailer (silent interval)