51Connection
Echochange - Manual / Connection
51
XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX.
Example: 2001:0db8:85a3:0000:0000:8a2e:0370:7344
To further shorten the string, leading zeros in a block can be omitted.
A sequence of blocks consisting only of zeros can be replaced with :: but only once in each IPV6
address.
Example: 2001:db8:85a3::8a2e:370:7344
For IPV6, usually names are specified instead of the IP addresses.
8.2.3.3 Port
Port numbers are addresses that are used on the transport layer in order to address
applications. Port numbers are required for TCP / UDP connections.
The port number is a 16 bit number from 0 to 65535.
Certain applications use fixed port numbers that have been assigned by the IANA and
that are generally known. Usually, they are between 0 and 1023. They are referred to
as well-known ports. The registered ports are between port 1024 and port 49151.
Application providers may register ports for their proprietary protocols.
The remaining ports (49152 through 65535) are referred to as dynamic and/or private
ports. They can be used variably because they are not registered and do not belong to
any application.
8.2.3.4 TSAP
TSAP = Transport Service Access Point
On the transport layer, ISO (H1) uses so-called TSAPs to address applications. These
connection endpoints are required both for ISO (H1) and RFC 1006 connections.
Parameters for ISO (H1) connections
Parameters for RFC 1006 connections
Own TSAP A
Dest TSAP B
MAC Address A
Own TSAP B
Dest TSAP A
MAC Address B
Own TSAP A
Dest TSAP B
IP Address A
Own TSAP B
Dest TSAP A
IP Address B
In order to establish the connection, the value in the Own TSAP field of communication
partner A must match the value in the Dest TSAP field of communication partner B, i.e.
they must match crosswise. Accordingly, the Dest TSAP field of station A must match
the Own TSAP field of station B.
Own TSAP (station A) = Dest TSAP (station B)
Dest TSAP (station A) = Own TSAP (station B)
This condition can easily be met if you set the same value for the Own TSAP and Dest
TSAP fields. These values may be identical.
If multiple connections are to be established between 2 stations, the TSAPs for the
individual connections be must different.
To exactly specify a connection, the combination of TSAP + MAC address (or IP
address) must be unique.
Rules for entering TSAPs for S7 connections
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