Hi,

Thanks for the confirmation that MMC is not required for IM153-4 (6ES7153-4BA00-0XB0) V4.0.

In this connection, I have attached a configuration pic fyi, IM still giving the BF flashing.

Even i checked with one-to-one configuration with H CPU but BF is not going away. My doubt is still it may require MMC which might be the reason it is giving BF.

We checked for the SIEMENS manual where for this model MMC card is required or not, but couldn't able to find it, plz share any such info too.

Thank you

Kishore

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Split from SIMATIC ET 200M 6ES7153-4BA00-0AB0 V4.0.3.

Hello,

what about check finally CPU diagnostic buffer for some events where reason can be described?