The commands to set memory switches are difficult to understand. Usually, it is recommended to set manual ly or throught the utility. Let us give you the simple example of the commands to set only MSW1-3 ON. (Hexadecimal)

1D 28 45 03 00 01 49 4E　（Enter setting mode）
1D 28 45 0A 00 03 01 32 32 32 32 32 30 32 32 (MSW1-3=ON and no other changes)
1D 28 45 04 00 02 4F 55 54　（Exit from setting mode）

8 memory swtich settings are specified togetger （"01" means MSW1）
There are 8 values (MSW1-8 first and MSW1-1 last)
Each values can be changed by 30 = ON, 31=OFF, 32= no change

This setting is effective even after power off.
Not all the POS printer can allow the same method. Please refer the command reference for the details.