We have 3 Frame 9 units. The problem facing us is that when we have an event or alarm comes from unit 1, these are generated in unit 3 (messages only), but when we check in control logic all is OK.
How can we solve this problem?

 

I want to know more detail information to deal with this problem. Unit 3 generated alarm why there are nothing in the control logic?

 

You want to know a lot, but you haven't given us any pertinent details.

What operator interfaces do you have? <I>s? HMIs?

What kind of turbine control systems do you have? Mark IVs? Mark Vs? Mark VIs? Mark VIes?

You may think that because you go to work every day at the same place that everyone else in the world knows what the configuration of your site is.

Well, here's a news flash: We don't. We can't help you if you won't provide some basic information. And, here's another news flash: The more information, and the better information you provide, the better response you will receive.

When did this problem start occurring? After who did what to the operator interfaces or the network that connects them? It's a pretty safe bet this hasn't been going on since commissioning, but then you haven't provided us with one single shred of information that we could use to help you with understanding your problem.

Suppose someone asked you, "What's that sign mean?" How would you answer the question? "What sign? Which direction? The upper or the lower one? The one with the green background or the one with the red background?"

GIVE US A CLUE!

By the way, if you've found this site, you've probably done some searching on it (or should have!). You'll generally find that those requests with the most concise and detailed information generally received the best and most concise and timely responses. Those that just ask why something doesn't work or isn't working don't generally get the best responses (like both of your requests!).

Try telling us a little bit about the units, the control systems, how long they've been working without any problems, and what happened just prior to the beginning of this problem (a maintenance outage; a display modification; a sequencing modification; a topology (cable/switch) change; some kind of download, major or minor).

'Cause these things don't usually just happen all on their own; they're usually initiated by some well-intentioned or ill-executed event.

So, let's hear about your site and when this started occurring and what happened just before it started occurring.