To my knowledge: No.

This says
Address of the variable: In your case VW148
Dataformat of the variable: Unsigned.
Number of decimal places: 0.

M111

You can see the axis number not able to show decimal point. 

I will included in the missing features and bug list.

That is a knowing bug.

You have given the variable a tag name is the tag list. If you make this, then can you not set decimal places in the trend.

Here you see a example in the attachment when the Variable has no tag name.

VW100s1

Variable = VW100
Format = Signed
Decimal places = 1