Jacques,
The output has to be 1.15
- Rakesh
On Nov 10, 2015 7:55 AM, "JACQUES GIRAUD" <jacques_giraud@xxxxxxx> wrote:
Rakesh,
I propose my suggestion would still work but instead of writing the value
of RI01to RO01 each execution, you would write it only when your delta of
0.2 is triggered.
That way, RO01 doesn't contain the last value of RI01, it contains the
last value of RI01 that triggered an update.
The catch would be if your signal doesn't change gradually and jumps more
than 0.2 between block executions.
How would you like to handle the following scenario. First scan,
measurement = 0.4 so output = 0.4 based on your explanation. Next scan,
measurement = 1.15 so what output do you want in this case?
Jacques
Date: Tue, 10 Nov 2015 07:11:45 +0530in
Subject: Re: [foxboro] Achieving deadband functionality in IACC
From: rakeshinxs@xxxxxxxxx
To: foxboro@xxxxxxxxxxxxx
Thanks Matt & Jacques. However i think through this logic we are
considering a signal change during a certain period i.e the scan time of
the CALCA block. So if a signal changes very slowly and crosses the
deadband i specify, it will not be captured. I dont want rate of signal
change as deadband. Want an absolute value. I want the signal to change
steps of 0.2. This 0.2 change can happen in 1 sec or even 1 minute. An(0,0);(0.19,0);(0.2,0.2);(0.29,0.2);(0.3,0.3) and so on. But i cant use
example can be usage of CHARC block. (x,y) >
charc block bcoz it cant cover the whole range of signal.wrote:
Hope my requirement is clear.
Rgds,
Rakesh
On Nov 10, 2015 7:00 AM, "JACQUES GIRAUD" <jacques_giraud@xxxxxxx>
wish
Rakesh,
Use a CALC block with a connection to RI01 from the analog signal you
toto evaluate.
The last statement in the CALC block should write the content of RI01
theRO01 and the first statements should compare RI01 & RO01 and generate
andoutput you desire.
When the block runs, RI01 gets updated with an "IN RI01" instruction
instruction,the previous value of RI01 gets brought in with an "IN RO01"
_________________________________________________________________________giving you the current and previous values you need.
Jacques
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