Mitsubishi D720 Inverter Problem

This topic has 8 replies, 6 voices, and was last updated 30 January 2018 at 10:48 by Gordon Smith 1.

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29 January 2018 at 15:51 #338873
Gordon Smith 1
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@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?
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29 January 2018 at 15:51 #31926
Gordon Smith 1
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@gordonsmith1
29 January 2018 at 15:54 #338875
Ian Parkin
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@ianparkin39383
You need to plough through the instruction manual /set up guide and change the control from local to remote
29 January 2018 at 16:17 #338880
Martin 100
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@martin100
**LINK**
29 January 2018 at 19:59 #338938
Gordon Smith 1
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@gordonsmith1
I have set the control to remote and the potentiometer will control the speed but forward and reverse don't work.
29 January 2018 at 20:33 #338942
Clive Brown 1
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@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
29 January 2018 at 21:11 #338945
Oldiron
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@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
30 January 2018 at 10:06 #338985
Gary Wooding
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@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.
30 January 2018 at 10:48 #338998
Gordon Smith 1
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@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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