CICS to EPI (Outbound data streams)

The 3270 commands are either write commands, which instruct the EPI to process the data, or read commands, which instruct the EPI to reply with data.

On a CICS_EPI_EVENT_SEND event, the command is one of the following 3270 write commands:

The first three commands are followed by a write control character (WCC) and data. An Erase All Unprotected command has neither WCC nor data. The Write Structured Field command is not generated by CICS® and is therefore not supported for the EPI.

The contents of the data buffer consist of:
A CICS_EPI_EVENT_CONVERSE event specifies a read command. The contents of the data stream vary with the source of the event, as follows:

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Timestamp icon Last updated: Tuesday, 19 November 2013


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