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Application and properties
1.3 Other services and properties
● Storage and event-driven transfer of process data
The CP can store events of different classes and transfer the corresponding process
values individually or bundled together to the communications partner. The transfer can
be triggered by various triggers.
● Analog value processing
Analog values can be preprocessed on the CP according to various methods.
● Online functions
From an engineering station (ES) on which STEP 7 is installed, you can use the online
functions of STEP 7 via the Ethernet interface of the CP to access the S7-1200 CPU if
the station is located in the same IP subnet.
The following online functions are available:
– Downloading project or program data from the STEP 7 project to the station
– Querying diagnostics data on the station
– Downloading firmware files to the CP
For a remote station located in a different IP subnet or that can be reached via the
Internet, these functions can only be used if the ES (with CP 1628 or via SCALANCE S)
is connected to the station via a VPN tunnel.
● SNMP
As an SNMP agent, the CP supports data queries using SNMP (Simple Network
Management Protocol).
For more detailed information, refer to section Parameter group "SNMP" (Page 67).
Security Functions of the transmission protocols
The transmission protocols that can be used for telecontrol communication support the
following Security-functions:
● MSC
The MSC protocol supports authentication of the communications partners and simple
encryption of data. A user name and a password are included in the encryption. An MSC
tunnel is established between the MSC station and MSC master station.
● MSCsec
with a user name and password. In addition to this, the shared automatically generated
key is renewed between the communications partners at configurable intervals.
16
MSCsec supports authentication of the communications partners and data encryption
Operating Instructions, 06/2015, C79000-G8976-C385-01
CP 1243-8 IRC
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