I am newborn in omron and using first time OMRON Sysmac CPM2A with Cx-programmar 3.1.I want to upload a programme to my laptop.but there is some problem to upload because connection Between PLC and laptop failed msg is appear on the screen.the LED of PLC communication blink during communication but no response to upload.what is the true procedure for upload/download and there setting in Cx-programmar.please tell me detail about this.i will be thankfull