Technical data

Manual VIPA System 300S SPEED7 Chapter 4 Deployment
HB140E - CP - RE_343-1EX71 - Rev. 09/46 4-13
Basics - MAC address and TSAP
There is a unique MAC address (Media Access Control) necessary for
each CP. Usually a module is labeled with its MAC address by the
manufacturer. This address should be used for project engineering of the
CP. The MAC address has a length of 6 bytes.
On delivery the first three bytes specify the manufacturer.
These bytes are
assigned by the IEEE committee. The last three bytes may be assigned by
the manufacturer.
In a network several stations with the same MAC address may not exist.
The MAC address may be changed at any time. You will get a valid MAC
address from your network administrator.
The MAC address, with which all bits are set to 1, is:
FF-FF-FF-FF-FF-FF
This address is used as Broadcast address and addresses all participants
in the net.
At the first-start-up the Ethernet CP 343S-NET - SPEED-Bus has an
unique MAC address. This may be found on a label beneath the front flap.
Note!
Please regard for the configuration of the network in the Siemens SIMATIC
manager that it is necessary to activate the ISO protocol and to preset a
valid MAC address within the properties dialog of the Ethernet interface of
the CP!
TSAP means Transport Service Access Point. ISO transport connections
support TSAP length of 1...16 byte. TSAPs may be entered in ASCII format
or hexadecimal.
An ISO transport connection is specified by a local and a remote
connection endpoint.
Station A Station B
remote TSAP
→
ISO transport-
→
local TSAP
local TSAP
←
connection
←
remote TSAP
MAC address A MAC address B
The TSAPs of an ISO transport connection must match as follows:
Remote TSAP (in CP) = local TSAP (in destination station)
Local TSAP (in CP) = remote TSAP (in destination station)
MAC address
Broadcast address
Address at first
start-up
TSAP
Address
parameters