Performance Data And Configuration Limits - Siemens CP 1243-8 IRC Operating Instructions Manual

Application and properties

1.4 Performance data and configuration limits

Note
Plants with security requirements - recommendation
Use the following options:
• If you have systems with high security requirements, use the secure protocols HTTPS
and SNMPv3.
• If you connect to public networks, you should use the firewall. Think about the services
you want to allow access to the station via public networks. By using the "bandwidth
limitation" of the firewall, you can restrict the possibility of flooding and DoS attacks.
Note the range of performance in the section Performance data and configuration limits
(Page 18).
For information on configuring the security functions, refer to the section Security functions
(Page 89).
You will find further information on the functionality and configuration of the security functions
in the information system of STEP 7 and in the manual /11/ (Page 137).
1.4 Performance data and configuration limits
Number of CMs/CPs per station
In each S7-1200 station, up to three CMs/CPs can be plugged in and configured, of which a
maximum of one CP 1243-8 IRC.
Connection resources
● Telecontrol connections
The CP can establish connections to up to 4 communications partners (master station or
master/node TIM).
The partners can be linked redundantly.
In addition to this, inter-station communication with up to 4 S7 stations with a
CP 1243-8 IRC can be operated via the master station.
● TCP connections
The CP can establish connections to up to 4 communications partners (S7 stations).
● Online functions
1 connection resource is reserved for online functions.
● S7 connections
8 connection resources for S7 connections (BSEND/BRCV)
These connections are used for SINAUT ST7 communication.
● PG/OP connections
– 2 connection resources for PG connections
– 1 connection resource for OP connections
18
Operating Instructions, 06/2015, C79000-G8976-C385-01
CP 1243-8 IRC