See note in post #4. The resolver is precisely set to a specific position on the motor to give it a commutation of 1.5708 rad. Any good servo motor repair shop familiar with ABB motors will have the equipment and knowledge to set the resolver to the correct position.
I don't have the IRB1200 in front of me to understand how the SMB power cable could have been plugged into the motor resolver connector. Pins 3 & 7 in the power cable are the 24VDC and pins 3 & 7 at the motor resolver connection should not have continuity. The resolver should have resistance between pins 1 & 6, 2 & 7, 3 & 8. Resistance should measure the same between 1 & 6 and between 2 & 7.