Hello,

I have a Step 7 project with multiple S7-300 PLCs, HMIs, MM420s and other drives as well. All communicating through profibus. One of the MM420s failed so was replaced. The same profibus module was re-used. Drive still needs to be configured. There is also STARTER project file with all the MM420s listed. I can look at every parameter offline of all the drives under "Expert List".

After multiple attempts, I was able to go online successfully using USB to RS485 adapter. But, the new drive shows up as an additional device. My efforts to download the pre-configured offline drive parameters into the target device was in vain. What steps are necessary to tell it the target drive is actually one of the pre-configured device listed in the project?

Any help is much appreciated.

Regards

* Findout the profibus node address of faulty drive

* Manually enter it in to P918 in new drive

* Try to download the project

karthik live

* Findout the profibus node address of faulty drive

* Manually enter it in to P918 in new drive

* Try to download the project

 Hi Karthik,

I will try your suggestion. But just wanted to be clear. The drive will be connected through profibus during normal operation but I have to take out the profibus module to hook up the USB to RS485 adapter. Does the new drive still need to have the same profibus address as the offline program in order for the download to work?

Hello,

Just follow the Uploading and downloading drive parameters of a MICROMASTER 4xx using STARTER  application example & download project in target drive, then change node address & connect profibus module.

If any error or rpoblem is faced please report here along wirh snap shot of error.