UM0272 datasheet(18/40 Pages) STMICROELECTRONICS

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Configuring system parameters

UM0272

18/40

Figure 11 describes the various key functions. In some cases, the same button has different

function in a different context.

Figure 11.

Control module keypad

4.4

Password protection

In order to perform any operation, password identification is required. The system is

organized with three password security levels. Press any key on the CM keypad to access

the password menu.

The service and the owner passwords must be different from each other because the CU

automatically recognizes the access level by the password. It is possible (but not

recommended) to use the same Owner (or Service) password as one of the User

passwords. All the User passwords must be different.

Table 2.

Password protection for each access level

Level

Description

Service

The service level is dedicated to system installation. All CU parameters are accessible

and modifiable and passwords can be setup. The CU cannot be enabled or disabled

when accessing this level.

Owner

This level is normally assigned to the protected ambient owner. Only parameters that

do not affect the hardware configuration are accessible (i.e. the zone timing, output

association, etc.). The CU cannot be enabled or disabled when accessing this level.

User

This level switches ON/OFF the CU and available partitions. It is impossible to modify

or display parameters.

UM0272 Datasheet(PDF) 18 Page - STMicroelectronics