Toshiba 6F3B0253 user manual Password protection

6F3B0253

6. Programming Information

6.10 Password protection

The T1-16S has the password function to protect the user program and data from unauthorized operations.

There are four levels of protection. Accordingly, three levels of passwords can be registered to control the protection levels.

These passwords are stored in the built-in EEPROM. Therefore, if you entered, changed or cleared the passwords, the EEPROM write operation is necessary.

The outline of the protection levels are shown below. For details, refer to the manual for the programming tool.

Protection level 4 (disabled functions)

•Writing register/device data

•Writing system information

•I/O allocation

Protection level 3 (disabled functions)

•Reading program

•Program write into EEPROM

Protection level 2 (disabled functions)

•Clear memory

•Writing/loading program

•T1/T1S operation mode changes (by programming tool)

•Setting/changing passwords

Protection level 1 (disabled functions)

• None (all functions are available)

Strict

When the level 1, 2 and 3 passwords are registered, the T1-16S will be started as protection level 4. In this state, for example, entering the level 2 password changes the protection level to 2.

NOTE

When you use the password function, do not forget the level 1 password. Otherwise, you cannot change/release the registered passwords.

Basic Hardware and Function 103