Slc 500 Modbus Communication

[huber78 0]

Hi, My first post so please be understanding! I have 12 Danfoss VLT 6000 series drives on one of my sites for the control of dry air cooler fans in a condenser water circuit. Communication is currently via the I/O terminals on the drive however I have been looking at changing this to Modbus communication. I weighed up Profibus and DeviceNet however dismissed them mainly due to the need to purchase additional interfaces for the drives. I have been looking at the MVI46-MCM Prosoft module for this application and am wondering if anyone has used this module specifically for communication with Danfoss drives and if so could they share their experiences? Any general feedback on this module would also be much appreciated. If this is successful I would be aiming at utilising this strategy across the entire site. Phil

[hightemp 0]

Hi Phil, Yeah, I'm a newbie as well. We have successfully implemented Ethernet Modbus to a Third Party device(Red Lion HMI). You didn't mention if you have a HMI in the mix. We have a Panel View Plus and 5/05 processor and the third party HMI device who likes Modbus. Ethernet connects all together. After some trials and fun we finally got the PVP to talk to the 3rd party HMI on Modbus Ethernet. Let me know if you need further info. Good Luck, Brian

[hipoint2 0]

Hey Phil, I did a project last year that involved a SLC 5/04 and 180 Danfoss VLT 2800 series drives. I don't know about the 6000 series but I know that the 5000 and 2800 series don't use Modbus they use Danfoss's protocol. And I took a basic module to send and receive the strings to each drive, had to use a basic module because channel 0 was used for a pc. Hope this helps you out. B.J.

[huber78 0]

Thanks for the responses guys. The VLT 6000 drives now come with Modbus as a communication option as standard - it never used to so I don't know when this became the case. I have decided to bite the bullet and buy an SLC 5/04 and the Prosoft module and give it a try. I might be back if it all turns sour...

[hipoint2 0]

Let me know how you make out because that is my next project. We just purchase 210 Yaskawa drives and I am going to run those with I think the Prosoft modbus module and have never done that before. From what I have been told is the module does alot of the leg work for you, which when I did the last project with the Danfoss FC protocol I had to it all. Good Luck

[bemondiet 0]

Hello, I have used the MVI46-MCM on many previous jobs and have found that it works very well. Prosoft is also one of the best companies I have found for technical support if you require it. The demo programs they have on their website should be enough to get you on your way. Brendan

[huber78 0]

Just thought I would post an update for the people who commented - the project is almost complete and as mentioned the Prosoft module takes all the hard work out of it. Commissioning is under way - I am now trying to demonstrate the advantages to the client of higher level comms. I think it is criminal to spend all that money on VF drives and not utilise the information they provide. Thanks again to everyone who commented. PH