PROFIBUS module mismatch

Hello

I´m trying to get a PROFIBUS network to work. Did the hardware configuration and set up the PROFIBUS network but I get several errors.

Error lights burning on S7-300 CPU315-2PN/DP:

• SF constant
• BF1 blinking

Error light burning on IM151-HF:

• SF constant

Error light on PM-E module:

• SF constant

I checked online in the diagnostic buffers and I find this error in the PLC buffer:

• Distributed I/Os end of synchronisation with DP master/IO controller on slot2.

This is the error I see in the IM151-HF and the PM-E:

• Module configured but not available, preset / actual mismatch

Im pretty sure the HW configuration is correct, however I can find two IM151-HF with the same serial number, I tried them both but they dont work: 6ES7 151-1BA02-0AB0

Checked the wiring and the resistors on the end of the cable. Also checked the address on the IM151-HF (64) and I use 64 in SIMATIC Manager.

What else should I check? Any suggestions what I could be doing wrong?

Thanks in advance!

Hi, 

Maybe terminating module?

See this SIMATIC ET 200S distributed I/O Interface module IM151-1 STANDARD (6ES7151-1AA06-0AB0) manual under "4.4.9 7 Incorrect module configurations of ET 200S on the PROFIBUS DP ".

I hope I could help!

Thanks for the fast answer!

Terminating module is present, I'll see if I can use another one tomorrow to see if its defect). I had it to work last week friday, but now I try it again and I cant get it to work anymore, even not with the old configuration I saved in a project, so might be a piece of hardware that is defect... Thanks for the hint!

Hi, 

The manual says under Status and error displays :

"Check the structure of the ET 200S for missing or defective modules or whether an unconfigured module is inserted...."

As it was working before the logic dictates that it is a loose connection somewhere. Make sure that the terminal modules installed securely, cards installed securely also the terminal module installed securely.

Apart from that, follow the guide of the above manual under chapter "4.4.9 Incorrect module configurations of ET 200S on the PROFIBUS DP ".

Please keep us up to date with your progress.