The FIFO always has a 16#8201 alarm ，How to solution this question?

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Split from S7-1500 FIFO .

Hello,

The error can be found in the manual of the library, here is what the error means:

"ERR_WRONG_TYPE_ITEM Error: The data type of the InOut parameter `item` does not correspond to the data type of the array elements of the input `buffer"

Thanks you