Hi,

I have redundant CPU 410-5H. I am getting a programming error on my alarm banner. The text on error is below.

"Programming Error 34: FB917 /7234/60000/3"

The diagnostic buffer is attached as well.

Urgent help on this will be appreciated.

Thanks

Hi Asad99,

If the Modbus block has not been licensed for this CPU yet, OB121 is called.

Thanks.

So I just need to activate the Modbus TCP License and this issue will be resolved?