dynamic Array indexing - SIEMENS PLC

[naturephoenix]

Is this possible somehow:
i want to call specific FB with dynamic DB, so like this

if MW50 = 2 then
FB40.DB102();
end_if;
if MW50 = 3 then
FB40.DB103();
end_if;
if MW50 = 4 then
FB40.DB104();
end_if;

Is this possible to do somehow in SCL without if else statements,
something using WORD_TO_BLOCK_DB() function or w/e

 

[L D[AR2P#0.0]]

No. Call an FC coded in STL to perform the call to FB40 with a dynamic instance DB.

 

[naturephoenix]

OPN DB400
L "MD80"
L 2
*D
SLD 3
L P#DBX 36.0
+D
LAR1
L 50
T D [AR1,P#0.0]

If i PUT INSIDE md80 = 1(IT'S dword)
i WANT TO PUT INSIDE db400.dbw38 = 50
IF i PUT inside md80 = 2 then
i WANT TO PUT INSIDE db400.dbw40 = 50
and so on.
I checked my LAR1 binary format adress and it's correct:
if MW80 is 1 theen pointer point on db400.dbw38, for 2 it's
db400.dbw40,
BUT FOR SOME unknown reason to me I always get value 50 in the
higher adress for 2 bytes. FOR example, if MW80=1 then db400.dbw40 = 50, if MW80=2 then db400.dbw42 = 50,
MD80 is DWORD
and DB400.DBW36... are INT variables
Why this happens?

 

[L D[AR2P#0.0]]

OPN DB400
L "MD80"
L 2
*D
SLD 3
L P#DBX 36.0
+D
LAR1
L 50
T D [AR1,P#0.0]

If i PUT INSIDE md80 = 1(IT'S dword)
i WANT TO PUT INSIDE db400.dbw38 = 50
IF i PUT inside md80 = 2 then
i WANT TO PUT INSIDE db400.dbw40 = 50
and so on.
I checked my LAR1 binary format adress and it's correct:
if MW80 is 1 theen pointer point on db400.dbw38, for 2 it's
db400.dbw40,
BUT FOR SOME unknown reason to me I always get value 50 in the
higher adress for 2 bytes. FOR example, if MW80=1 then db400.dbw40 = 50, if MW80=2 then db400.dbw42 = 50,
MD80 is DWORD
and DB400.DBW36... are INT variables
Why this happens?

You are writing double words to ints.

 

[naturephoenix]

You are writing double words to ints.

Ty