Block protection: A password concept also protects the user program from unauthorized access as well as the keyswitch.
Integrated HMI services: The user only has to specify the source and destination of the data with HMI devices. The data are then transported cyclically and automatically by the system.
Integrated communication functions:
PG/OP communication
Expanded communication (simple and high-availability)
Configurable Attributes
The STEP 7 "hardware configuration" tool and the installed S7-400H options package are used to configure the features and response of the S7-400H, including the CPUs, for example:
Multipoint interface MPI:
Definition of node addresses
Startup/cycle behavior
Stipulation of the maximum cycle time and communication load
Address allocation: Addressing of I/O modules
Retentive area: Definition of the number of retentive bit memories, counters, timers, data blocks, and clock memories
Protection level: Definition of access authorizations to program and data
System diagnostics: Definition of the handling and scope of diagnostics messages