To measure the rpm of the shaft (rotation speed of the shaft), Encoder that detects both incremental and decremental rpm.

Can any one know the suitable encoder in Schneider?

 

You could be looking for a "quadrature" encoder. However, you often need a card to decipher the signals.

They use multiple pulse trains, and the relationship between these trains will determine which way you are rotating.

Unfortunately, you are not providing much information to work with here, and you would be best suited by contacting a rep from Schneider (or an alternate supplier) to address your needs.