CU250S and encoder e6b2-cwz6c Omron

Is possible connect an encoder omron "E6B2-CWZ6C 1000 P/R" with Sinamics CU250S 6SL3246-0BA22-1PA0?

I have this issue because encoder there aren't all signals.

http://www.mouser.com/ds/2/307/e6b2-c_ds_csm491-25665.pdf

there are only phases A, B and Z.

Manual CU250S in this link you can find back application examples with 'non'-siemens encoders.

Hope it helps...