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This Adapter Type defines the means by which an acceptor function block containing a TUNING_ADP socket can act as a server supplying a TUNING service to a provider function block (the client for the service) containing a TUNING_ADP plug. As shown in the figures above, this service is provided via two service sequences:

• The write sequence provides a unidirectional transfer of tuning data (KP,TR,TD) from the client to the server.
• The read sequence provides a readback of the tuning data (KP_RB,TR_RB,TD_RB) actually in use by the server, which, due to changes in the its mode or state, may different from the (KP,TR,TD) values previously written by the server.

See the TUNING_HMI, TUNING_SIM, TUNING_CLIENT and TUNING_SERVER function block types, and the TUNING_TEST and the TUNING_TESTR system configurations for examples of the use of instances of this adapter type.