Siemens SIMATIC S7-200 System Manual page 62

S7-200 Programmable Controller System Manual
The S7-200 Provides Password Protection
All models of the S7-200 provide password protection for restricting access to specific functions.
A password authorizes access to the functions and memory: without a password, the S7-200
provides unrestricted access. When it is password protected, the S7-200 limits all restricted
operations according to the configuration provided when the password was installed
The password is not case-sensitive.
As shown in Table 4-3, the S7-200 provides four levels of access restriction. Each level allows
certain functions to be accessible without a password. For the four levels of access, entering the
correct password provides access to the functions as noted below. The default condition for the
S7-200 is level 1 (no restriction).
Entering the password over a network does not compromise the password protection for the
S7-200.
You can in effect, disable the password by changing the password level 4, 3, or 2 to Level 1, since
Level 1 allows all unrestricted CPU access.
Table 4-3 Restricting Access to the S7-200
CPU Function
Read and write user data
Start, Stop, and Power- -Up Reset
of the CPU
Read and write the time- -of- -day
Clock
Upload the user program, data,
and the CPU configuration
Download of Program Block, Data
Block or System Block
Runtime Edits
Delete of Program Block, Data
Block, or System Data Block
Copy of Program Block, Data
Block, or System Data Block to the
memory cartridge
Force data in status chart
Execute the single or multiple scan
Writing of output in STOP mode
Reset of scan rates in PLC
information
Execution status
Project compare
Having one user authorized to access restricted functions Reset of Scan Rates in PLC information
does not authorize other users to access those functions. Only one user is allowed unrestricted
access to the S7-200 at a time.
Tip
After you enter the password, the authorization level for that password remains effective for up
to one minute after the programming device has been disconnected from the S7-200. Always
exit STEP 7-Micro/WIN before disconnecting the cable to prevent another user from accessing
the privileges of the programming device.
48
Level 1 Level 2
Access allowed
Access allowed
Password
required
Level 3 Level 4
Access allowed Access allowed
Never allowed
Password
required (Never
allowed for
System Block)
Never allowed
Password
required (Never
allowed for
System Block)
Password Password
required
Password Password
required q
Never allowed Never allowed