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Is there any configuration required to make it a controller as oppose to a device

Hi. I have a 1214C PLC. 6ES7 214-1HG31-0XB0 v3.0 Can it be used as a profinet controller without any additional hardware?

Yes I tried that but it made no difference.

I get that now. Thanks.

Hi. Just a bit confused with the photo above that I posted which shows the BK3120 on Ebay that is powered up and has other leds on along with io err led. Makes me think that my bk3120 is faulty.

I haven’t bought any yet. Didn’t want to waste money if the coupler was faulty. I was going to get a KL1114 and a KL2134.

I just realised that. I dont have a KL-9010 to try. It did seem weird that the 9011 would make any difference.

Its still the same. Any thoughts?

OK. I have tried with profibus connected but no IO or terminator. I will try with a full setup.

Looking at the same coupler on Ebay with power applied with no profibus or termination module other leds are lit.

Here are the power connections

Just 24v to the coupler power terminals.

Hi. When I apply power to a Beckhoff BK3120 coupler the only led indication I get is the I/O ERR led. Nothing on the RUN, BF or DIA leds. There are no IO modules attached and no Profibus connected. Is the coupler faulty?

I tested the server / client setup with modscan simulator and found both were working as they should. So the tried and tested method of fixing problems, ie a power cycle fixed my problem. Also Holgemaik was almost correct the offset for MW0 is 12289.

Looking at the 750-842 status webpage it shows a 0ms modbus connection timeout ,would this be an issue?