As shown above, an instance of this composite function
block type is a provider for an adapter connection of type TEST_ADP, that is, it contains
a plug of type TEST_ADP . It contains GUI
(graphic user interface) elements that enable it to function as a server
for the testing of the adapter connection. Additional event and data
inputs ( REQ_EVT WITH QI ) and outputs ( CNF_EVT
WITH QO ) are provided to illustrate a separate event/data
"pass-through" functionality, independent of the plug interface.
See the TEST_ADP_SYS
configuration for an example of the use of an instance of this type.
An instance of this type can be launched and tested, with the results shown below.
- The initial situation.
- The INIT event creates the GUI elements.
- Entering data and clicking CNF has no effect, since there is no socket to receive this event and data.
- Changing the state of QI and clicking REQ_EVT passes the value through to QO, independent of the plug interface.
