Siemens SIMATIC TeleControl DNP3 Configuration Manual page 20

Functions and requirements
1.5 Performance data and configuration limits
Connection resources
● Telecontrol connections
The CP can establish connections to up to 4 communications partners.
The partners can be linked redundantly.
● 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)
● S7 routing
Max. 4 connections at the same time
● PG/OP connections
– 2 connection resources for PG connections
– 1 connection resource for OP connections
Number of data points for the data point configuration
The maximum number of configurable data points is 200.
Frame memory (send buffer)
The CP has a frame memory (send buffer) for the values of data points configured as an
event.
The send buffer has a maximum size of 64000 events. The size of the frame memory is
divided equally among all configured communications partners. It can be set in STEP 7, refer
to the section Communication with the CPU (Page 62).
You will find details of how the send buffer works (storing and sending events) as well as the
options for transferring data in the section Process image, type of transmission, event
classes (Page 113).
Messages: E-mail
Up to 10 messages to be sent as e-mails can be configured in STEP 7.
● Maximum number of characters that can be transferred per e-mail: 256 ASCII characters
including any value sent at the same time
IPsec tunnel (VPN)
Up to 8 IPsec terminals can be established for secure communication with other security
modules.
20
Configuration Manual, 11/2018, C79000-G8976-C508-01
Configuration - DNP3