How to communicate with Q00J by the cpu programming port?

Hello All:
Does anyone know the comm protocol for Q00J(by the programming port on cpu panel)?Although I know some manuals have noted that the RS232 port on QOOJ cpu panel is not applicable for communication with the third HMI.

Hi
Do you know that about MX component,Computer communication with PLC use the ActiveX lib.
other side,you can find protocol in http://www.mitsubishielectric-automation.cn.