I am having faults on my Profibus network, consisting of a fiber optic ring with several OLMs, and drops off each OLM are Supermicro softPLCs (CP Card).

The network consists of 12 Nodes & the distance between each OLM is ~10meters

I checked the installation: Copper cables, connectors all found to be good. There are no power cables or VFD drives is the vicinity of the Profibus cables.

I connected up the Profitrace adapter to analyse & found reqular station loss & retries on several devices.

Each drops from the OLM is more than 2 meters.

In Profitarce Software, what i did notice was the transmission speed, set at the maximum of 12MB/s. I dont think it is nescessary to run at that high rate & this may be the cause of these comms faults.

Can somebody assist me?

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Split from Bus fault in profibus network.

Closed, cause question posted twice.

The second thread is published with the subject Faults on Profibus network, possible to reduce the speed? within the conference Communication / Networks.

Greetings
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