Siemens CP 1242-7 GPRS V2 - Performance Data and Configuration Limits

Application and functions
1.4 Performance data and configuration limits
CP 1242-7 GPRS V2
Operating Instructions, 10/2016, C79000-G8976-C311-02
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Security functions of the CP
The CP supports the following Security functions:
●
Encrypted telecontrol communication
You configure the interval of the key exchange between the CPU and telecontrol server in
STEP 7 in the parameter group "Ethernet interface (X1) > Advanced options > Transfer
settings".
●
Configuring authorized phone numbers on the CP
To authorize nodes allowed to establish a connection to the CP during telecontrol
communication.
●
Telecontrol password
To authenticate the CP with the telecontrol server
●
STARTTLS / SMTPS
For the secure transfer of e-mails
●
NTP (secure)
For secure transfer during time-of-day synchronization (with telecontrol communication
disabled)
●
HTTPS
For secure access to the Web server of the CPU
Note
Plants with security requirements - recommendation
If you have systems with high security requirements, use the secure protocols NTP
(secure)
and HTTPS.
1.4
Performance data and configuration limits
Number of simultaneous connections for telecontrol communication
● 1 reserved connection for user data exchange with the telecontrol server
Number of simultaneous TeleService connections
● Max. 1 TeleService connection
Number of simultaneous connections for S7 communication and Open User Communication
A maximum total of 22 connection resources for S7 communication and Open User
Communication (OUC)