Hi Matt,
Thank you for this. The code obviously looks better than what I have
implemented; This was done on a fast track mode, I tested to work at the time;
I wanted to visit this but dragged till I saw this email chain.
I process little better with IF cycle on a panic mode; So, introduced 2sec (LC
scan was 2s) wait between two IFs to make sure that the level really drops to
avoid spurious trip was the aim of that 2sec delay; I should have avoided the
2sec WAIT for alarm FLAG, moving one line upwards when HOLIM is set to true as
you have done below
I will test this to be sure (due to my deficiency) as I see it works and modify
the existing code, this year. Thank you
Regards,
Srini
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On ;
Behalf Of Gunter, Matt
Sent: Wednesday, February 06, 2019 8:46 AM
To: foxboro@xxxxxxxxxxxxx
Subject: [EXT] Re: [foxboro] Rate of drop Alarm with respect to time
WARNING: This email originated from outside of the organization. Exercise
caution when viewing attachments, clicking links, or responding to requests.
Srini,
I offer this up without any testing or guarantees... The usual disclaimers
regarding the use of anything below could result in the end of life as we know
it all apply!
In a real text editor, everything lines up with slight indentation for
readability.
I don't care for the use of labels because it lends itself to spaghetti code.
I don't know the purpose of all of the 2s delays so there is only one in the
code below, but I think it would accomplish what you are after.
VARIABLES
NOW :R;
DELTA :R;
PREV :R;
FLAG :B;
SET :B;
USER_LABELS
{INPUT}
LC30 : RI0001; {LC30.MEAS}
{OUTPUT}
FLAG : BO0001; {Status of Logic for Alarms}
HOLIM : RO0001; {HOLIM connect to LC30_HOLIM}
OUT1 : RO0002;
STATEMENTS
PREV := LC30;
HOLIM := 100;
WHILE
NOW := LC30;
DELTA := PREV - NOW;
OUT1 := DELTA;
IF ((DELTA >= 5) AND SET) THEN
HOLIM := 0;
FLAG := TRUE;
ELSEIF (DELTA >= 5) THEN
SET := TRUE;
ELSE
SET := FALSE;
ENDIF;
WAIT 2;
HOLIM := 100;
FLAG := FALSE;
PREV := NOW;
ENDWHILE;
ENDSEQUENCE
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