Bobodopalus

mx2 control with modbus

6 posts in this topic

Posted (edited)

Hi all

im back to trying to get my inverter to work but this time with modbus, from this post http://forums.mrplc.com/index.php?/topic/38445-controlling-mx2-inverter-without-modbus/

and im stumped, im sure its just one thing somewhere messing it up

i have a cp1l-el20 with a cp1w-cif11 and a 3g3mx2 inverter and am attempting to control it via modbus, it is wired up as follows, sp+ to RDB+, sn- to RDA-, common to the plc pin and plc output pin 100.00 to logic input 1.

im using 100.00 to put it into run mode

the paremeters ive put in are a1=3,a2=1, a4=50, c070=3, c071=5,c072=1, c074=00, c075=1, b27=1.

im using MOV to set my speed to d1001

attached is my inv002_refresh x31 fb

thanks to any1 who can see my silly mistake

 

 

inverter fb.png

Edited by Bobodopalus
added info

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getting back on it this morning, i just set the error FB locations up and im constantly getting a busy flag

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just to add to this, ive been on the phone with omron for a long time changed the scanlist to #2 but still no luck, the person at omron had a go with my code with no luck until he changed the data area to W however when i applied this still no luck

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for anyone who finds this in the future, it eventually worked, i think it was clearing the settings which got it working in the end

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Congrats mate! You didn't give up. Can you enlighten us how you got it working after initial problems?

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omron support got it to work by changing the area id to W instead of D as well as changing the MOV to the new W address, for whatever reason that fixed it, he wasn't too sure why

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