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Gustav74 avatar image

Unable to connect with Multiplus via MK3 USB

Hi

I am installing a system using Multiplus charger/inverter. I need to configure the Multi. Hence communication between PC (Lenovo Win10) and Multi is required.

I have installed the VE configure III and I have a MK3 USB interface.

When I let the VE Config auto detect nothing happens i.e. the programme is doing a search and eventually times out.

When I try manual connection to e.g. Com3 an error message apperas saying "Cannot open Com3" - it does not help to change Com port no.

I have removed and re-installed the MK3 driver. In device manager I am able to locate the virtual serial port i.e. that part seems to work fine.

I have also tried to use the VE Bus Quick Configure software - and the error is the same

Any good suggestions?

p.s. I have tried on a different Multi and the error message is still the same. I have not tried a different PC yet - not so easy due to remote location

Multiplus-IIconfigMK3
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5 Answers
Guy Stewart (Victron Community Manager) avatar image
Guy Stewart (Victron Community Manager) answered ·

Could you please try VictronConnect?

https://docs.victronenergy.com/victronconnect-vebus.html

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I have tried on both Multi's - no device found in both attempts.


blond2silver avatar image
blond2silver answered ·

Hello, From experience, if the CCGX or Venus gateway is plugged into the Multi, the auto-detect does not connect the MK3.. In this instance, by manually selecting Com3, I have found that the MK3 will connect even while the CCGX is still plugged in. For this install, not having to remove the Multi cover for VEconfigure changes with the MK3 is my preference - meaning, not having to remove the Multi cover. Otherwise, if you'd rather remove the Multi cover, and plug in the MK3, "I think" Victron's preferred solution is to disconnect the CCGX or Venus when making Multi changes with the MK3 and VEconfigure.

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Gustav74 avatar image
Gustav74 answered ·

Hi @Justin

I gave up on my computer and used a different. Connection is on - so far so good.

Any chance you know if I can use multiplus ii for L1 and L2 and then a multiplus for L3?
VE config complaints about firmware.
Is it “just “ Update firmware on the multi?

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Gustav74 avatar image
Gustav74 answered ·

@Justin Cook, Thanks for the feedback. Would you recommend uninstall of the "old" set of programmes prior to complete package download?
Unfortunately there will be a little while until I'm back on the site - but I'll let you know if your tip did the trick (Y)

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@Gustav74, no I highly recommend that you keep all available tools from Victron loaded on your computer; one never knows when one tool will do the trick when another doesn't! Better to be over-prepared than under!

Justin Cook - Bay Marine Supply USA avatar image
Justin Cook - Bay Marine Supply USA answered ·

@Gustav74, Com3 is your USB port, so the error seems to be indicating that the MK3 is not able to communicate with your USB port, or vice/versa.

I've encountered this once before and I still don't know exactly why, but the way I fixed it was by downloading and installing the entire "VE Configuration Tools for VE Bus Products" package, which includes a set of USB drivers that in theory is the same set as the one you can individually download... but, for some reason, the USB driver package that comes with the "Configuration Tools" package solved my problem.

Download that toolset directly here https://www.victronenergy.com/Executables/VEConfig/VECSetup_B.exe

Once that's installed, restart your computer and try connecting again, even through VictronConnect, and I bet it'll work this time... let us know!

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