Place your function blocks and
connections in here. Use your cursor
to make this area as large as you
Inputs
5.2.1 The Function Block Diagram (FBD) Window
The Function Block Diagram (FBD) window is used for programming of the α and α2 series
programmable controllers.
The FBD window is where you will do most of your programming. From the FBD window you
can create a program, simulate the program’s operation, download and then monitor the
program running on the controller.
Creating a program
• Choose a function or logic block for your program
• Set parameters for the block by double clicking on the block
• Connect the blocks in the correct sequence using the Wiring Tool
Simulating a program
• Set the inputs and watch how your program will change the outputs. Simulation mode lets
you do this without connecting to a controller. This is a great way to prototype a program.
Monitoring a program
• Run your program on the controller while connected to your PC. You can set the inputs in
software and see the results in real life. This is a great way to prototype a program.
Outputs
Double Click here to
give your program a title
Q u i c k S t a r t G u i d e