AC450 system message mtype 26, code 1
Does anyone have a more specific explanation of this system message?
Is it an object in a HMI-display pointing at a renamed DB-object? If so, how can I get more specific info about which?
address = H'83 = D'131, = trace number
Task = DCBAB00 = AI object handler.
Data1 = 0 and 1 = parameter value.
Data 2 = H'00504645, No explanation
Target System Identity: QC07-BAS41*4.0/3 *02/01/12/ QC07-LIB41*4.0/0
Voted best answer
Hello Martin, sorry for late reply
26 1 Internal (other) errors
DCBAB00, Signal Handler AI
H’83 Improper position flag for analog signal
0/1 Old/New status in p2/p3
H’504645 Status field in incoming trans
This has something to do with AI(C) signals but unfortunately we can not point-out to which one.
We believe that on an AI(C), one of the properties EN_L2, EN_L1, EN_H1 or EN_H2 have been modified from 1 to 0 while the signal was in alarm state.
As an exaple, if the value was > H2 and at this very time the programmer has set EN_H2 = 0.
So, what you have to look for is :
An AI(C) with a value oscillating around a limit (you said that the messages come all the time)
If the messages started after implementation of a specific application, then the search is limited to the AI(C) having to do with this application.
If you don’t know where to search, you could activate/deactivate all the AI one after the other and see when the system message stop (process may be influenced!)
Once you have found which signal is making trouble, you have to set e.g. EN_H2 = 1, wait until the value goes out from alarm state and set EN_H2 = 0.