MICROLOGIX-1400 serial event

[kevalvakani]

Hello,

I got a MICROLOGIX-1400 Series A PLC and for some purpose I want to control it remotely through some means over internet.

So my setup is like this:

INTERNET <========> Controller <=========> PLC

I have completed:

INTERNET <========> Controller
this part,

So now my controller is able to create some events like
sending characters like "A", "B", .....etc

Now I want my PLC to take proper action like SETTING OUTPUT PORT ON whenever event "A" occours on my CONTROLLER.

SO,
I want to know is there any method or way of serial event management programming for this series of PLC in LADDER programming?

Or any other way to get this to work.
I have been trying since one month but did'nt suceeed

Thank you