Specifications

Application in combination with TCP/IP CP143 H1 / TCP/IP manual
5-62 Rev. 00/07
5.11.2.2 UDP-Connection
The UDP protocol is a communication control service that does not require a connection and that is
not always reliable. This protocol may be used to transfer data with one or more processors without
first establishing a virtual connection. Individual datagrams are transferred to an external node but
the reception of transmissions is not acknowledged.
(UDP may be used to transfer information that changes continuously. Should the transfer of one set
of data not be successful, then the next set that is more up to date will be transferred after only a few
seconds.
Fig. 5-29: Interactive window UDP-Connection
Parameters for a UDP-Connection
Connection name
You may specify a name for the connection. The name may consist of a maximum of 32
characters.
Frame offset (SSNR-Offset)
The frame offset (SSNR-offset) determines the frame from the start address that is used as
communication job by the current job. Frame offsets are normally only used in multi-
processor systems with values larger than zero.
Please use the following values when assigning frame offsets:
• Frame offset 0 for CPU 1
• Frame offset 1 for CPU 2
• Frame offset 2 for CPU 3
• Frame offset 3 for CPU 4
Range:0to3