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n the properties of the CPU, assign parameters for a password in STEP 7 for the display
operation. Local access protection is thus protected via a local password

The display of the CPU offers the following advantages:
● Reduced downtimes through diagnostic messages in plain text
● Tine saving during the commissioning, maintenance and downtime of the plant by
changing interface settings (e.g. address) of CPU and connected CMs/CPs. No
programming device is required.

monitored and changed by the monitoring and force tables. You can find additional
information on the watch and force tables in the section Test functions and fault
correction (Page 302) and in the STEP 7 online help.
● Without a programming device on site, an image (backup copy) of the functioning plant
can be
– backed up to the SIMATIC memory card of the CPU
– restored by the SIMATIC memory card of the CPU.
● For F-CPUs: Overview of status of safety mode and of F-parameters of F-CPU and F-I/O.
Access protection for the display
In the properties of the CPU, assign parameters for a password in STEP 7 for the display
operation. Local access protection is thus protected via a local password
● Shorter downtimes due to read/write access to force tables and read/write access to
watch tables.
This allows the current values of the individual tags of a user program or a CPU to be

The display of the CPU offers the following advantages:
● Reduced downtimes through diagnostic messages in plain text
● Tine saving during the commissioning, maintenance and downtime of the plant by
changing interface settings (e.g. address) of CPU and connected CMs/CPs. No
programming device is required.
● Shorter downtimes due to read/write access to force tables and read/write access to
watch tables.
This allows the current values of the individual tags of a user program or a CPU to be

Fail-safe digital modules are available for implementing safety concepts in the area of
equment and personnel safety (for example, for emergency stop devices in the operation
of processing machines).
The fail-safe modules ensure safe processing of field information (sensors: e.g., emergency
stop buttons, light barriers; actuators, e.g. motor control). You are provided with all the
hardware and software components required for safe processing, according to the required
safety class. The following table shows the available fail-safe modules.The fail-safe input and output modules provide you with the following advantages:
● High-channel, fail-safe inputs and outputs
● can be used centrally in SIMATIC and in ET 200MP distributed I/O system
● processing of standard and safety programs
● uniform engineering for standard and safety automation in the TIA Portal
● Integration of safety functions up to SIL 3 according to IEC 62061 and PL e according to
EN ISO 13849-1Analog input modules detect process signals, e.g. pressure or temperature and pass them
on in digitalized form (16 bit format) to the CPU. You use the analog input modules to