How to use To Instrument Block in Simulink to send variable Data to a device?

Hello!! Everyone i am new in Simulink and wants to send data over Serial Port using Serial Port. I came to know about blocks in Instrument Control Toolbox. Serial Send, Serial Receive, To Instrument and Query

As i have to send data, i choose serial send.

I configure the Serial Configuration and then use Serial Send block to send data, get unexpected data. I changed to "To Instrument Block" and read this tutorial

http://www.mathworks.in/help/instrument/building-simulink-models-to-send-and-receive-data.html#brbv5x6-1

to send data to Serial Port.

But Suppose i want to send "Arun Sharma" whole string to serial port then how can i do this. Please some one help me.