Dear Experts

I have 6T-Model B Control system. When I entered PC parameter it accepts all editable parameters. But when machine restarts all PC parameter return to their default values. I mean there is no PC parameter saved. The PC Parameter are not saving in memory however machine parameters are accepting changes. I am using procedure define in Fanuc Manual p(B-54025E/01) sec 5.2 pg 165, which is as under;

1- Turn on a parameter write-enable toggle switch on the CNCs main (mother) board. This switch is clearly marked on the board.
2- CNC will display the alarm page. An alarm #100 is displayed.
3- Mode-select switch in MDI mode and also emergency stop is pressed.
4- Press the PARAM button twice.
5- Press P.
6- Now enter parameter manually.and after each parameter i pressed input key.

Please suggest your recommendations.

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