User guide

5. Parameter
5−5
Festo P.BE−CPX−CMA X−CONTROL−EN en 0908NH
5.2 Access protection
5.2.1 Password protection
The password protection prevents unauthorised controlling
or modifying of parameters, e.g. via a freely accessible MMI
in a producing plant. The password only prevents write ac
cess  reading is always possible.
There are three ways to modify parameters:
 via the diagnostic interface  with a PC or MMI (in prep
aration),
 via fieldbus
through the operating PLC (I/O data in
parametrising mode),
 via fieldbus through a configuration master.
You can assign a password for the diagnostic interface in the
CMAX. Modifications are always possible via fieldbus. When
starting up the device for the first time, it will not yet have a
password created.
Areas that are protected
are the modification of parameters
and the controlling of inputs, start, stop, teaching and firm
ware download. Permissible is the display of parameters,
project upload, the display of actual values, setpoint values,
diagnostic data.