How adrress bit from a siemens DB

I have a PLC siemens S7-1512, i can read all real DB tags, but i have a db only with booleans and it’s not possible read it. I try with DB500,x1.1 but don’t Works.
Some ideas?

The only idea I can imagine, it’s to try with an expression tag, with the function getBit. But It is strange that you don’t have success in take the data in the way you described