Antwort: Undocumented fault messages

Hi Mark,

Here is the answer to your question about the undocumented fault messages
(those without text descriptions). They should not influence the statistical
counters ("turbine OK" still increments after the faults occur) and do not
effect the behavior of the turbine.

-Garth

---------------------- Forwarded by Garth Ripton/EWC/Enron on 06/07/2002
11:09 AM ---------------------------
From: Gert Torbohm@TWTDE on 06/07/2002 02:58 PM CED
To: Garth Ripton/EWC/Enron@ENRON
cc: Andre Riesberg/DEVELOP/TWT/DE@TWTDE, Detlef Menke/DEVELOP/TWT/DE@TWTDE,
Till Hoffmann/DEVELOP/TWT/DE@TWTDE, Clemens W"ste/DEVELOP/TWT/DE@TWTDE

Subject: Antwort: Undocumented fault messages

Hi Garth,
we don't know the reason for these 'fault' appearances, yet. It has to do
with the communication between PC and PLC.
But : it did not influence the status of the turbine, neither it shuts down,
nor downtime counts up.
In version 1x629 the solve the problem, but the real cause is not solves,
until now. Clemens will work on it.

What's the time schedule for updating V1x629 ?
Best regards and nice weekend
Gert.

Garth Ripton@ENRON
06.06.02 22:07

An: Andre Riesberg/DEVELOP/TWT/DE@TWTDE, Detlef Menke/DEVELOP/TWT/DE@TWTDE,
Gert Torbohm/DEVELOP/TWT/DE@TWTDE, Till Hoffmann/DEVELOP/TWT/DE@TWTDE, Klaus
Holtel/DEVELOP/TWT/DE@TWTDE
Kopie:
Thema: Undocumented fault messages
Hallo Zusammen,

I received a document from our operations department that shows the occurence
of faults at the Mill Run site for the month of April. There are a number of
"undocumented" fault/status messages that are logged frequently:

"EM247" 102 times
"EM242" 102 times
"EM238" 101 times
"EM237" 101 times
"EM235" 101 times
"EM312" 56 times
"EM280" 56 times
"EM248" 56 times
"EM304" 52 times
"EM272" 52 times
"EM311" 51 times
"EM306" 51 times
"EM302" 51 times
"EM301" 51 times
"EM299" 51 times
"EM279" 51 times
"EM274" 51 times
"EM270" 51 times
"EM240" 51 times
"EM269" 50 times
"EM267" 50 times

Most of these fault were logged on turbine 5 and turbine 6 (with a few on
turbine 7). They are not distributed between all the turbines but isolated on
a few.

The major question that that operations asked me was which production
statistic timer was incremented when these conditions were logged. My guess
is that since none of these stop the turbine that the "OK" timer continued to
increment. Is this correct?

The question that I have is: what is causing so many of these messages in the
log? Do these status messages have any specific meaning? According to the
documentation there are only about 220 messages that have descriptions in the
error list data base (in VisuPro v1.27.0.0). Where are the other messages
coming from? (This is version 13527 Bachmann software.) I think this issue
was brought up several months ago but I don't think we got any additional
information.

Gru?,

Garth