Festo CPX-FB38 Electronic Manual page 82

2. Commissioning
2−46
A CPX terminal can only be parameterised if the function
System start with default parameterisation and current CPX
expansion" is activated (set System start" system parameter
accordingly).
In this case, the factory−set parameter settings are valid in the
CPX terminal after the power supply is switched on
(Power ON).
If you wish to specifically change individual parameter values
without inputting again settings that have already been
made:
1. Approve" parameterisation (permit), that is, activate
function System start with default programming and
current CPX expansion" (see above).
2. Do NOT restart system or CPX terminal (this ensures that
parameterisation already performed is not reset to factory
settings).
3. Change or enter parameters.
4. Block" parameterisation again, that is, activate function
System start with saved parameterisation and saved CPX
expansion".
Please note
Change the setting of the system parameter System start"
to System start with saved parameterisation and saved
CPX expansion" after completion of parameter entry to
ensure that parameterisation remains intact even after a
system restart or after changes to the control program
(of the higher−level system controller).
If the function System start with saved parameterisation
and saved CPX expansion" is activated, the entered or
changed parameter settings become valid immediately
after the power supply is switched on (Power ON).
Festo P.BE−CPX−FB38−EN en 0804NH