Someitimes you need to edit the unit that will receive the gcode program in the CC200..
1. For example, you need to edit your unit to be 600 BAUD in the control and the PC.
2. Check if your control allows you to edit where are you receiving the program from, either the CONTROL or THE PANEL (very important)
3. If you have the option of turning OFF Unit Control for receiving programs, take it off.
4. Check your transmission requirements for your controller, (e.g, Parity, Stop Bit, Start Bit, and Handshaking terms)
5. If you checked all these and you are sure about what you are doing, your control panel board may be defective...
Good Luck
Mak