Dear User,

OPN   "SRC"

L     #INDEX
L     P#0.0
SLD   3
+D
TAR1
L DBB [ AR1 , P#0.0 ]
OPN   "DEST"
T DBB [ AR1 , P#0.0 ]
+AR1

 Your code section contains wrong selection of codes.Using TAR1 is logically wrong because you need the load the result into AR1(LAR1).I can point out the others , but the easiest way for mass data transfer is using SFC20 and the rest of similar SFCs.Check the online manual of STEP 7 for more hints.

If you want to practice indirect addressing, a code section like this will help you to copy 100 number of bytes from source DB to destination.More can be found if you search the forum.

L     100

lp1:  T     #lp

OPN   DB     1
OPN   DI     2
LAR1  P#0.0                       // starting point, this can be selected
L     #lp                         //loop counter from 100
L     100
TAK
-I
SLD   3                           // form byte number
+AR1
L     DBB [AR1,P#0.0]
T     DIB [AR1,P#0.0]
L     #lp
LOOP  lp1

I hope it helps,

hdhosseini

I don't understand why you used TAK instruction and why we need to do subtraction('-I)