Siemens 7MB1420, Instruction Manual, Page: 25 / 74

8.3 Coding and Organization of Operating Function Groups
The functions are combined into groups according to their type:
To prevent important parameters from being deleted or modified by mistake, there are several
function levels which can only be accessed using special codes. Note that the decimal point key
must be pressed before entering a code.
The factory settings for the codes of the three levels are:
Level 1 .111
Level 2 .222
Level 3 .333
The codes can be redefined using function 50. Function 50 also enables the device protection by
codes to be switched off for a certain time or permanently.
The CAL key must be pressed to signal an intervention on the device to the control room if applicable.
The device is automatically recoded by pressing the MEAS key.
All operations permissible for a level can be carried out if you are in level 1, 2 or 3. Higher function
levels also include the lower function levels. For example, from function level 3 you can execute all
operations of levels 0 to 3, and from level 2 all operations of levels 0 to 2.
A description of the operation functions is provided in the appendix.
Function groups
0
1
2
3
Types of function
Display functions
Calibration and adjustment functions
Functions for input of application parameters
Functions for input of device parameters
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