defcon.klaxon
Lifetime Supporting Member
Hi guys,
Tomorrow I'm heading down to take a look at an existing SCADA system that has failed, and I was wondering if anyone had some suggestions for what I might keep an eye out for. I've never worked with this particular site so I'm not entirely sure what to expect, though I am lucky in that the company I work for installed it (back before I worked here) so I have some pretty good system level documentation.
The system is a water treatment plant, and the master PLC is a Siemens Simatic S7-300. The specific issue is that on the master PLC, there is a "BUSF" failure. From what I've gathered from some Google searching already, this failure indicates that there is a comms failure between the master PLC and one or more of its slaves, which are communicating via PROFIBUS. The system operator has told me that the problem started after a recent storm (with lightning). They've tried power cycling everything but that does not seem to help.
I know it's a broad question, but if anyone had any suggestions for what I might look for, and/or what the BUSF failure could indicate, I'd be most appreciative. Thanks all!
Tomorrow I'm heading down to take a look at an existing SCADA system that has failed, and I was wondering if anyone had some suggestions for what I might keep an eye out for. I've never worked with this particular site so I'm not entirely sure what to expect, though I am lucky in that the company I work for installed it (back before I worked here) so I have some pretty good system level documentation.
The system is a water treatment plant, and the master PLC is a Siemens Simatic S7-300. The specific issue is that on the master PLC, there is a "BUSF" failure. From what I've gathered from some Google searching already, this failure indicates that there is a comms failure between the master PLC and one or more of its slaves, which are communicating via PROFIBUS. The system operator has told me that the problem started after a recent storm (with lightning). They've tried power cycling everything but that does not seem to help.
I know it's a broad question, but if anyone had any suggestions for what I might look for, and/or what the BUSF failure could indicate, I'd be most appreciative. Thanks all!