Siemens SIMATIC S7 System Manual page 232

PROFINET
7.4 PLC-to-PLC communication
Parameter
General
End point: Partner
Interface
Subnet
Address
Connection type
Connection ID
Connection data
Active connection setup Radio button to select Local or Partner CPU as the active connection
Address details
TSAP
TSAP ID
1
Transport Control Protocol (TCP)
TCP is a standard protocol described by RFC 793: Transmission Control Protocol. The
primary purpose of TCP is to provide reliable, secure connection service between pairs of
processes. This protocol has the following features:
● An efficient communications protocol since it is closely tied to the hardware
● Suitable for medium-sized to large data amounts (up to 8192 bytes)
● Provides considerably more facilities for applications, notably:
● A connection-oriented protocol
● Can be used very flexibly with third-party systems which exclusively support TCP
● Routing-capable
● Only static data lengths are applicable.
● Messages are acknowledged.
● Applications are addressed using port numbers.
● Most of the user application protocols, such as TELNET and FTP, use TCP.
● Programming effort is required for data management due to the SEND / RECEIVE
232
Definition
Name assigned to the partner (receiving) CPU
Name assigned to the interfaces
Name assigned to the subnets
Assigned IP Addresses
Type of Ethernet protocol
ID number
Local and Partner CPU data storage location
(ASCII) Local and Partner CPU TSAPs in ASCII format
1
Local and Partner CPU TSAPs in hexadecimal format
When configuring a connection with an S7-1200 CPU for ISO on TCP, use only ASCII characters
in the TSAP extension for the passive communication partners.
– Error recovery
– Flow control
– Reliability
programming interface.
S7-1200 Programmable controller
System Manual, 11/2009, A5E02486680-02