Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 204)

PC NC Maintenance Manual Chapter 7: Memory Option
7-2
RAM DIMM should be installed into bank DIMM2 (the middle slot shown
below).
Ensure that the DIMM is fitted securely in the slot and that the latches to the left
and right of the DIMM are fully upright. To remove the DIMM, the latches must
be pressed down, which releases the DIMM from the slot. The DIMM can then be
easily pulled out. DO NOT pull the DIMM without first pressing the latches.
Then, close the CPU rack, plug the power cord into the CPU rack, and power ON.
A memory count of the total RAM size then appears on the screen.