Hello ,

I Have Discovered Issue(not really but its not good too) In Old Code That,

IF Any one of the Variable is Changed
THEN writetable :=True

it means Every single time it will go and write value in table, I want to improve that in some better way.
If Any one Could suggest Anything it will be great.

Thank You

Please explain your purpose/problem a bit more, some more information on what you are trying to achieve would be welcome

hello Aliazzz,

I explain The problem here :

if at least one parameter changes, send parameters table to Database

IF( (
mParameter1 <> pParameter1 OR
mParameter2 <> pParameter2 OR
mParameter3 <> pParameter3 OR
mParameter4 <> pParameter4 OR
mParameter5 <> pParameter5 ))
THEN
writetable := TRUE;

END_IF

• I Want To improve this logic because For 5 parameter its okk but Now i have more than 20 so its not wise to call write table everytime.

Thank You,

Hi,
one possibility would be to use a FOR loop and Arrays. Something like this:

VAR
   mParameter : ARRAY [0..ArrayLength] OF INT := [1,2,3,4,5];
   pParameter : ARRAY [0..ArrayLength] OF INT := [1,2,3,7,5];
   counter : INT;
   writetable : BOOL;
END_VAR
VAR CONSTANT
   ArrayLength   : INT := 4;
END_VAR

FOR counter := 0 TO ArrayLength DO
   IF mParameter[counter] <> pParameter[counter] THEN
      writetable := TRUE;
      EXIT;
   END_IF
END_FOR

Originally created by: Viacheslav Mezentsev

Struct + pointer + mem utils + crc.

I'd go with a crc approach as this is way more flexible with regards of your array/tablesize.
If the current crc (of your table) differs from the newly calculated crc then you trigger the writing of the table.
The example @Viacheslav Mezentsev demonstrates this mechanic.