how to crack a protocol???

[don01]

on our site we have a number of PLCs in order to improve the plants performance the introduction of a "supervisory or master computer" (scada) would be ideal.

BUT It seems that these units are outdated (we only purchased the last 2, 3 years ago) and nobody knows much about them.(or wants to know)
I can program them and monitor specific values thru a laptop or the specialised programer. The laptop gives me a RS232 interface to the units.

Is there a software package or a simple way to "trap " the data transfer. this would give me a look at the protocol and maybe we can generate the drivers from this.

PS the PLCs are Mitsubishi AOJ2-H units and the programing /monitoring software is Mitsubishi's MEDOC

It would be really great to beat this and any ideas suggestions very gratefully received.

Thanks Don

 

[nbucska]

capturing is easy, tomake sense of the captured data you need imagination and some ingenuity.

It helps if you know, what is being transmitted. <nbucska@pcperipherals.com>

 

[MMAshwin]

Hi

If its not already cracked by know, I use comLite32 (a free version of the Inet) for capturing and analyzing the data.


Contact:
Ryan Porter, ComLite32 & ComLab32 Program Manager
Internet: rap@endymion.com
In the US, call: 1-800-232-0485
Phone: (352) 373-2626
Fax: (352) 373-7707

Regards