DO Instruction Conversion

Hello all,

I have been looking for some knowledge base on S5 DO instruction.  I have been able to figure out the indirect addressing when it comes into play for DW/FWs.  I have just come across 'DO DB 148'.  Below i have included the JU and then the logic inside.

JU FB 48

NAME: MULW

IN:  DW 100

INDB:  DB 148

MUL:  KG +25.4000015

OUT:  DW 100

OUTD:  DB 149

FB 48 LOGIC

DO  =INDB

L  =IN

JU  OB 220

FDG

LWD  =MUL

XG

GFD

DO  =OUTD

T  =OUT

DB 148 and DB 149 have lengths of 254.  Any/all assistance with this would be great.

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Split from S5 DO instruction conversion to S7.

Closed cause question posted twice.

The second thread with the subject DO Instruction Conversion with DBs is published within the conference SIMATIC S5 / STEP 5.

Best regards
Jen_Moderator