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System Parameters 
Passcode 
P1 and P2 
P*921 Enable Code 
Enables the passcode (P*922), which means the passcode must be entered 
to  go  into  program  mode.  If  disabled  (set  to  0),  then  no  passcode  is 
required, and ENTER is used to enter program mode. Default =1 (Enabled) 
P*922 Passcode 
This is the passcode that must be used to enter program mode. The default 
is 1997, but this can be changed to another value from 0 to 9999. 
Backup 
P1 and P2 
P*925 Parameter Backup & Restore 
This parameter is used to make a backup of all parameters, for example to 
ensure a default set is maintained within the unit. If alterations are made to 
the parameters  that  do  not  work as  intended,  then  the  backup  set can  be 
restored into the unit. 
You can make two separate backup copies if you wish, called backup 1 and 
backup 2, and restore from either. 
The options are: