Simatic S5-155U Copy DB to another

Hi guys,

I need realize some modification on CPU947-155U.
The main problem I'm facing is write the code to make a function as SFC20 in S7.

I try to explane better the situation,
I 've the Data block destination (DB180)with 80 words having different format (eg: KT,KH,KF etc. etc.)
So in particular condition, I need to move all the words of the Data block source (DB181) to the DB180.

The data block are exactly the same about the lenght of data and the format also.

So I don't like use for every single word the code:

A DB181
L DW0
A DB180
T DW0
.....
.........
............
.............

I know is possible use the instruction TNB, but really I don't know how to start, for me the Siemens example using the indirect addresses in S5 not very clear.

SO anyone pleasure can send or attach a code example....

Thanks advance

i am not remember s5 but i know that :-
1- make loop couner for 80 (no. of words)
2- use do command for indirect address

following the suggestion of mohamedzoba, in German language

If think you must change the D 1 to L KB 1 / -F to get the SPN to work properly. Perhaps ADD KF-1 also works (not sure).

The index should be one less than the count.

I used OB180 in this untested implementation:

Does the old (946)/947 contain OB 180?

Thanks all guys,

for your fast answered.

This afternoon start to test your examples.

Regards

KalleOlsen said:

Does the old (946)/947 contain OB 180?

Click to expand...

No - scratch my code.

lntegrated Special Function Overview​

​

​

​

​

OB 121 Set/ read time of day
OB 122 Turn interrupt disable onloff
OB 124 Delete STEP 5 blocks
OB 125 Generate STEP 5 blocks
OB 126 Transfer process image tables
OB 200, Functions for multiprocessor communication
202 to 205
OB 223 Compare CPU restart types in multiprocessor operation​

OB 254, 255 Transferlduplicate data blocks (DBs) and extended data blocks (DXs)

Thank L D[AR2,P#0.0]

CPU 947 supported also OB182, practically it enought similar to the SFC20 in S7.

I'll see this afternoon