Controlling the handshake bit

Control of the handshake bit is recommended to check whether the data of the lower-level controller is still correctly received, processed and signaled. The following logic must be implemented on the higher-level controller for this purpose:

IF Handshake_Out = Handshake_In THEN

  Invert Handshake_In

ELSE

  Time monitoring, with error in the event of time violation

END_IF