Entering And Releasing A Password - Siemens S7-200 System Manual

5.4

Entering and Releasing a Password

Entering and Releasing a Password
You use the Text Display wizard of STEP 7-Micro/WIN to configure the password for the TD
device. Refer to Chapter 4 for information about configuring the TD device. To ensure that
an unauthorized user does not have access to the TD device during an interval for the
automatic time-out, you can use the Release Password feature.
Certain operations (such as forcing I/O or making a memory cartridge) may also require that
the operator enter the 8-character CPU password for the S7-200 CPU. (You must have
enabled the S7-200 CPU for password-protection in order for the TD device to prompt the
operator for the CPU password.)
Entering the Password
If configured for a password, the TD device prompts the operator to enter the 4-digit
password before allowing the operator to access screens or menus. If the password uses
fewer than 4 digits, the operator must press ENTER for the unused (remaining) characters.
Use the UP or DOWN arrow to select each digit of the password, pressing ENTER to move
to the next digit. You can also use the RIGHT and LEFT arrows to move within the
password.
The TD device provides a time-out feature which automatically restores password protection
after a period of inactivity. If no buttons have been pressed after 2 minutes, the TD device
then requires a password again before allowing an operator to access menus or to edit
variables.
Releasing the Password
In order to provide additional security for your application, the TD device provides a Release
Password command that immediately restores the password-protection. The TD device then
requires that the operator enter the password before allowing access. The Release
Password command prohibits another person from using the TD device without first entering
a password (for example, before a password entered by an operator times out).
You access the Release Password command from the main menu, as shown in figure below.
The Release Password is not applicable for the CPU password: The TD device releases the
CPU password as soon as the operator exits the function that required the password.
For example: If the operator entered the CPU password in order to force an I/O point in the
S7-200 CPU, the TD device releases the CPU password as soon as the operator exits the
Force menu.
The Release Password command is available only if you defined a 4-digit password when
you configured the TD device.
Text Display (TD) User Manual
System Manual, 08/2008, A5E00765548-03
Operating Your Text Display (TD) Device
5.4 Entering and Releasing a Password
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