Application and functions   
1.3 Communications services 
  CP 1542SP-1, CP 1542SP-1 IRC, CP 1543SP-1 
12  Operating Instructions, 01/2017, C79000-G8976-C426-03 
 
Communications services 
Communications services 
The following communications services are supported: 
● 
S7 communication and PG/OP communication with the following functions:
 
–  PUT/GET as client and server for data exchange with S7 stations 
–  PG functions 
–  Operator control and monitoring functions (HMI) 
For S7 communication, the CP requires a fixed IP address. 
● 
 
–  Routing of S7 connections via the backplane bus and the CPU to other S7 stations 
● 
Open User Communication (OUC)
 
OUC via program blocks with the following protocols: 
–  TCP/IP 
–  ISO-on-TCP 
–  UDP 
The CP 1543SP-1 supports Secure OUC. 
You will find the program blocks supported by the three CP types in the section 
Programming (OUC) (Page 95). 
● 
E-mail using program blocks
 
● 
 
Via HTTP / HTTPS you can access the Web server of the CPU. 
For telecontrol communication of the CP 1542SP-1 IRC, see section Telecontrol 
communication of the CP 1542SP-1 IRC (Page 13). 
For information on the Security functions of the CP 1543SP-1, refer to the section Security 
functions (CP 1542SP-1 IRC, CP 1543SP-1) (Page 15).