Using EDF in dual-screen mode

In dual-screen mode, you use one terminal for EDF interaction and another for sending input to, and receiving output from, the transaction that is being tested.

You start by entering, at the EDF terminal, the transaction CEDF tttt , where tttt is the name of the terminal on which the transaction is to be tested.

The message that CEDF gives in response to this transaction depends on whether there is already a transaction running on the second terminal. If the second terminal is not busy, the message displayed at the first terminal is:

TERMINAL tttt: EDF MODE ON

Nothing further happens until a transaction is started on the second terminal, when the PROGRAM INITIATION display appears.

You can also use EDF in dual-screen mode to monitor a transaction that is already running on the second terminal. If, for example, you believe a transaction at a specific terminal might be looping, you can go to another terminal and enter a CEDF transaction that names the terminal at which this transaction is running. The message displayed at the first terminal is:

TERMINAL tttt: TRANSACTION RUNNING: EDF MODE ON

EDF picks up control at the next EXEC CICS command executed, and you can then observe the sequence of commands that are causing the loop, assuming that at least one EXEC CICS command is executed.