Siemens Simatic S7-400

Structure of a CPU 41x
2.4 Mode selector switch
S7-400 Automation System, CPU Specifications
2-12 Manual, 10/2006, 6ES7498-8AA04-8BA0
without particular authorization (password). On password level you can access all PG
functions.
Setting the Security Classes
You can set the security classes (1 to 3) for a CPU in STEP 7 -> HW Config.
You can delete the security class set STEP 7 -> HW Config by means of a manual reset
using the mode selector switch.
The following table lists the security classes of an S7-400 CPU.
Table 2-9 Security classes of an S7-400 CPU
CPU function Protection level 1 Protection level 2 Protection level 3
Display of the block list Access allowed Access allowed Access allowed
Monitoring Variables Access allowed Access allowed Access allowed
STACKS module status Access allowed Access allowed Access allowed
Operator control and monitoring
functions
Access allowed Access allowed Access allowed
S7 communication Access allowed Access allowed Access allowed
Read time of day Access allowed Access allowed Access allowed
Set Time of Day Access allowed Access allowed Access allowed
Block status Access allowed Access allowed Password required
Downloading to the programming
device
Access allowed Access allowed Password required
Downloading to the CPU Access allowed Password required Password required
Delete blocks Access allowed Password required Password required
Memory compression Access allowed Password required Password required
Download user program to memory
card
Access allowed Password required Password required
Control selection Access allowed Password required Password required
Control variable Access allowed Password required Password required
Breakpoints Access allowed Password required Password required
Leave hold Access allowed Password required Password required
Memory reset Access allowed Password required Password required
Force Access allowed Password required Password required