hi everybody,

i want to use indirect addressing as follow:

there is a byte with the name "index" in a DB say db9.

i want to use this "index" byteto write desired values in some addresses in the same db, which are started from a specific address and indexed by the "index" byte.

can you please guide me about this problem?

also please tell me that is it possible to use arrays for indirect addresing i.e. can i use these instructions:

L 5

T #index

L Array[#index]

thanks very much.

dear yy1,
thanks for your reply,
but this not the problem which i have exactly.as i said there is an array of data with a specific start addressin a DB block,and i want to read or writea byte from this array which the index of this byte is in byte in the same DB block and is variable.
for example consider the following DB:

address symbol type
0 indexbyte
1 A1byte "base address"
2 A2byte
3 A3byte
4 A4byte
5 A5byte
6 A6byte

now let index to be 3 ,i want to read the byte 1+3=4which 3 is thevariable index stored in theDB block and 1 is the address of the firstvariable in the array.
please guide me about this problem.

to use indirect addressinga byte such as,"DB9.index"or "DB9.DBB.0".
if u want to make DB9.DBB0 ... DBB6 to I0.0 ... I0.6, you can use "SFC20 BLMOV".

S7-300 can make int plus and real plus.
example:
L MW 0
L DB9.DBW0
+I
T MW 0