Thanks for your post and I hope your well today.
The requirements for Scan Engine for cRIO is,
Software:Real-Time Module 8.6+NI-RIO 3.0+ with Scan Mode Support installed on cRIOHardware:The majority of cRIO hardware does support Scan mode; however, the following do not:Controllers: NI 9002, and NI 9004Backplanes: NI 9101, NI 9102, and NI 9072
To use the 9102 you can do the following trick,
Using CompactRIO Scan Mode with Unsupported Backplanes
hope this helps,