152  AO2000 CONTINUOUS GAS ANALYZERS  |  OI/AO2000-EN REV. B 
 
 
 
Access lock 
Access lock via function block configuration 
Independent of the user interface priority adjustment it is possible to com-
pletely lock the access to the operation of the gas analyzer from a certain 
user interface (HMI), 
This lock is effected by configuration of the function block Access Lock. The 
Technical Information "Function Blocks – Descriptions and configuration" 
contains complete information on the individual function blocks. 
Access denied 
When a user tries to operate the gas analyzer via a locked HMI, the following 
text is displayed after pressing the Menu key: 
Access denied! 
The gas analyzer operation  
is currently locked. 
Cancel: <BACK> 
Access lock via password protection 
As an alternative to the above-described complete access lock it is possible 
to inhibit entering the main menu and thus switching to the menu mode via 
password protection (see page 186).