Mitsubishi D720 Inverter Problem

[Gordon Smith 1Participant @gordonsmith1]

I have a used Mitsubishi D720 inverter which is OK when operated from the front panel. With a remote control pad connected only the potentiometer works, the forward, reverse and jog functions are dead. I presume that some of my parameter settings are wrong. Can anyone help?

[Gordon Smith 1Participant @gordonsmith1]

[Ian ParkinParticipant @ianparkin39383]

You need to plough through the instruction manual /set up guide and change the control from local to remote

[Martin 100Participant @martin100]

**LINK**

[Gordon Smith 1Participant @gordonsmith1]

I have set the control to remote and the potentiometer will control the speed but forward and reverse don't work.

[Clive Brown 1Participant @clivebrown1]

On my VFD, a Teco, the potentiometer (analogue input control) is one set of parameters, and the stop/start, forward/reverse, jog etc, (digital input control) is a different set. Both have to be set correctly.

Don't know if the Mitsubishi is similar though.

 

Edited By Clive Brown 1 on 29/01/2018 20:34:28

[OldironParticipant @oldiron]

Usually there are 2 settings for external control,

1st is Source of runtime frequency control :- set to Potentiometer.

2nd is Source of runtime command:- set to External signal control. The wording in your manual may differ a little but the basics are the same.

 

If the parameters are set for remote operation ensure that the 3 wires for the rev/fwd are connected correctly.

The usual layout for fwd/rev is :- 1 wire to FWD, 1 wire to REV and the 3rd wire should either go to the CM/Com (common) or earth if no common terminal.

If the connections are ok recheck the parameter settings.

On many of the VFD's I have used the jog only works with the e-stop button engaged.

ALSO on some remotes on Ebay etc the wiring for the remote:- fwd = Blue, rev = green, and control signal for 24v/12v/COM = red. In many cases you use the Com or Earth terminal. The wiring colours are not very intuitive so care needs to be taken there.

 

regards

 

 

Edited By Oldiron on 29/01/2018 21:13:09

[Gary WoodingParticipant @garywooding25363]

I'm using four 500 series Mitsubishi inverters in my workshop. Although yours is 700 series I don't think the wiring is completely different. Here's how I've wired mine up.

I hope it helps.

Here's how to set the source logic.

[Gordon Smith 1Participant @gordonsmith1]

That's solved it. Swopped the jumper, which strained my ageing eyesight, and the remote now functions correctly. Many thanks.

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