Omron CS1G-CPU42H Replacement Manual From C200H To Cs page 23

(4) The PLC memory data cannot be maintained when the PLC model is changed. Open the PLC Memory Window
for both C200H and CS1, and copy and paste the necessary memory data
(5) The I/O allocation of C200H is partly different from that of CS1. Refer to Appendix B. Change of unit area
allocation and modify the ladder program.
(6) The PLC settings of C200H are partly different from those of CS1. Refer to Appendix C. Change in PLC
settings and change the PLC settings.
(7) Select Compile from the Program Menu to check the program. If an error is detected, correct it.
(8) Save the program with a new project name. (Select Save As from the File Menu.)
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Select the necessary PLC Memory on the C200H PLC Memory Window, and
copy and paste it onto the CS1 PLC Memory Window.