Press [ DGNOS/PARAM] → [PARAM] → Change PWE to 1

PWE : 0 No allowance to change parameters

            1 Parameter write enable.

Use [PAGE ↑],[PAGE ↓], and cursor keys to make the appropriate selection.

Change Parameter 0123:   1  Set G20 (Inch System) at system start up.

                                                0 Set G21 (Metric system) at system start up.

Note:

Any parameter change will take effect only when the next power on

cycle. So when parameter is changed, please power on CNC again.

System parameters can only be modified while the system is in MDI

mode with M-READY status, and the PWE parameter is set to 1.