Procedure
Some of the parameters must be configured in accordance with the R/2 System communication system ("DC system") (CICS, IMS under MVS/VSE or UTM under BS2000). Examples of these are provided below:
TXCOM entry with the technical communications data (for example K50 ).
Length of the CPI-C data buffer (in bytes) which is transmitted with a SEND or RECEIVE command. The maximum value is 8191 bytes.
Number of SEND commands transmitted before a RECEIVE command is sent, according to the IDoc CPI-C protocol. A SEND command corresponds to one buffer.
If you choose synchronous transmission mode, the Number buffers parameter is no longer evaluated.
The R/2 System must send a confirmation after data transfer. This confirmation does not correspond to a status confirmation, therefore also no new status.
Specify whether the status records are to be sent to the R/2 System immediately when an IDoc is received, later (that is, scheduled using a report), or not at all.
Result
The transmission parameters are now set. You must still schedule reports for IDoc inbound processing and for subsequent status confirmations for the R/2 System.
Port Type CPI-C (Inbound Processing): Scheduling ReportsExample
CICS data communication system (MVS/VSE operating system)
The selected CPI-C data buffer should be as large as possible (at least 4 KB). The product of the buffer size and the number of buffers must be significantly less than the 32 KB CICS dialog buffer. Therefore a number buffer between 3 and 6 is used (Example: 4 KB ´ 6 = 24 KB).
For performance reasons, you should not activate the synchronous transmission mode.
IMS data communication system (MVS/VSE operating system)
Depending on the size of the IMS message queue, the length of the CPI-C data buffer should not exceed 1 - 1.5 KB.
Always activate the following transmission options under IMS:
UTM data communication system (BS2000 operating system)
The CPI-C data buffer size should be between approximately 5 KB and the maximum value (8191 bytes). There are no constraints concerning the size of the dialog buffer.