Return index for signal
port, const char *
Enter the value returned by the function xPCOpenTcpIpPort.
Enter a signal name.
Returns the index for the signal with name
If the function detects an error, it returns
xPCGetSignalIdx function returns the
index of a signal. The name must be identical to the name generated
when the real-time application was built. To find the name, access
the generated code, where
the name of the model. The creator of the custom program already knows
the signal name.