Star delta motor running in reverse

That is interesting I'd expect the 6 terminals to be  

U1 U2

V1  V2

W1 W2

Where U1-U2 is one winding, V-1-V2 is another.

having said that it may be so you can do this with simple links, though you are using the Y D starter to do the links

What is the make of the motor ?

However, assuming it really is as you think, but to be safe do please check that first with a meter on  ohms, 

swap the wires  U1 with V1  and the wires U2 with V2. 

(or indeed any winding that is a 1-2 pair for any other winding that is a 1-2 pair)

It would be cleaner to swap any 2 phases at the point they enter the machine.

Mike

Just switch L1 to V1 and L2 to U1

Just switch L1 to V1 and L2 to U1

be careful - that works with a motor wired with fixed links, but if you exchange the L1 and L2 to the ‘1’ ends of a pair of  windings, but the supplies  to the ‘2’ ends of the  of the same windings are not also swapped, that will reverse it for starting in star, but as the starter is supplying both ends separately, you can have a situation where once up to speed the right way, and switched to the delta connection it may then try to reverse and go round the wrong way - which is likely to be very impressive/expensive.

Of course if the starter is supplied from a point after the L1- L2 switch, then you do not need a second swop…

Mike.

“It would be cleaner to swap any 2 phases at the point they enter the machine.” 

I agree with Mike. It is safer to swap the 2 phases at the MCCB than do at the induction motor. I use to do this rectification for reversing a Star-delta motor. The motor rotated reverse as I need.

Cheers

Eddy