Communication Operation And Setting; Wiring And Configuration Of Pu Connector - Mitsubishi Electric FR-D720 K Series Instruction Manual

Table of Contents

4.19 Communication operation and setting

Purpose

Communication operation from PU

connector

Restrictions on parameter write

through communication

4.19.1 Wiring and configuration of PU connector

Using the PU connector, you can perform communication operation from a personal computer, etc.

When the PU connector is connected with a personal, FA or other computer by a communication cable, a user program can

run and monitor the inverter or read and write to parameters.

(1)

PU connector pin-outs

NOTE

 Pins No. 2 and No. 8 provide power to the parameter unit. Do not use these pins for RS-485 communication.

 When making RS-485 communication between the FR-D700 series, FR-E500 series and FR-S500 series, incorrect

connection of pins No. 2 and No. 8 (parameter unit power supply) of the above PU connector may result in the

inverter malfunction or failure.

 When multiple inverters are connected using pins No. 2

and No. 8, power is provided from the inverter which is

powered ON to the inverters which are powered OFF in

case inverters which are powered ON and OFF are mixed.

In such case, a protective circuit of the inverter, which is

ON, is activated to stop communication.

When

connecting

communication, make sure to disconnect cables from No.

2 and No. 8 so that pins No. 2 and No. 8 are not connected

between inverters.

 When using the RS-485 converter which receives power

from the inverter, make sure that power is provided from one inverter only. (Refer to the figure below.)

 Do not connect the PU connector to the computer's LAN board, FAX modem socket or telephone modular connector.

The product could be damaged due to differences in electrical specifications.

Initial setting of computer link

communication (PU connector)

MODBUS RTU communication

specifications

Communication EEPROM write

selection

Inverter

(receptacle side)

viewed from bottom

multiple

inverters

for

Computer

Station 1

RS-232C

Inverter

connector

RS-232C

RS-485

converter

Distributor

Connect pins No. 2 and No. 8

of one inverter and a converter only.

Power supply