We have a Injection Molding Machine from Mitsubishi with a A2US-S30 CPU. I would like to establish a communication of this PLC with a PC. The CPU has a 25 Pin Dsub connector. How can I achieve this? This is an old machine and we don't have any manual for this PLC. Somehow I could find an instructions manual on the internet but this manual does not contain information regarding PC communication or supported communication modules. I have never worked with this Mitsubishi A series PLC. Please suggest a way to start and share any manual which I could refer to. Thanks!