Specifications

CP143 H1 / TCP/IP manual Software
Rev. 00/07 5-49
5.10.2.2 H1 Datagram-connections
H1-Datagram connections are unsecured connections. The transfer is not subject to a negotiated
type of connection. No acknowledgement is required when data is received. Lost datagrams are not
detected, e.g. when the receive buffer is too small.
The datagram service is intended for multicast- and broadcast messages.
To initiate an unsecured connection select the sub-menu H1 Datagram-connection from the menu
item Connection. The following interactive window will be displayed:
Fig. 5-23: Interactive window H1 datagram-connections
Parameters for an H1 datagram-connection
Connection name
You may specify a name for the connection. The name may consist of a maximum of 32
characters.
Frame 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