User guide

5. Parameter
5−6
Festo P.BE−CPX−CMA X−CONTROL−EN en 0908NH
The following parameters can be modified despite password
protection:
PNU
Parameter Description of the reason
116 Project identifier reserved for the FCT (synchronisation status).
130 Password Must be writable.
133 System password reserved for the FCT (reset CMAX in the event of Forgot password").
204:05 Number of new
entries
Diagnostic memory display (status value, no parameter).
1173:01 Limit value status Required for the display of the limit values (status value, no para
meter).
Tab.5/4: Parameters that can be written without password
Creating a password
PNU 130 contains the password as a string. The parameter
PNU 1192:04 controls the acceptance and delivers the cur
rent status. To define a password for the CMAX:
1. Write the password in PNU 130, e.g. PNU 130
=My_password".
2. Accept the password into the device data by setting
PNU 1192:04 = 1.
The password
is implemented as a string in CMAX and con
sists of 8 bytes (ASCII code: 32 to 127). This permits upper
and lower case letters, numerals and special characters such
as dash ’−’, smaller ’< ’, at ’@’ etc.