To erase the program in memory, put mode select rotary switch in MEMORY mode, press the "C" (cancel) key on the number keypad and the ERASE button at the same time.
To store program into memory through the tape reader port (in your case, through the Controls West board: Put the mode select switch in MEMORY position, Get your computer ready to send data, then press the READ button. You must have a "%" at the end of the program or it won't finish reading. Most 5Ts can read both EIA programs and ISO programs. It can not accept decimal points, lower-case letters, or comments within parentheses. If pressing READ does not trigger your PC into sending, you may have to start the DNC software sending manually. That Controls West board is pretty limited, and I don't think you can get support for it anymore.
To reset program to the beginning, put the mode select switch into EDIT mode, then press the RESET button.
To edit a command within your program, or to enter one from scratch manually, put the mode select switch into EDIT mode, and press the SCAN+ and SCAN- keys to scan up to the point in the program where you want to edit something. Run the address LED (using the "left-right" buttons) to the address letter you want to enter, key in the number you want to enter and press INSERT (to insert new data) or ALTER (to alter an existing command). At the end of each block, you must have an EOB (End-of-Block), which you can enter by pressing the EOB key, then the INSERT key. The EOB looks like a funny symbol on the LED display, and it corresponds to the Line-Feed character (LF) in your program.
To run a program that's in memory, put the control into MEMORY mode and press CYCLE START.
If you need a new BTR (Behind the Tape Reader) interface, we have one that bypasses that Controls West board and lets you connect a special cable between your PC and the Fanuc tape reader port. For info on that, visit our West coast distributor, Refresh Your Memory, Inc. at www.rym.com