I thought I would post on this subject in case others run across the same issue we had when using Wonderware HMI software communicate to a S7-400H system.  For most of our values and setpoints we use in our systems, we use REAL values since it makes for more accurate math calculations.  These values would not show correctly on the screen when tagging to the Siemens nomenclature. (See Below)

The Wonderware help section was not clear on the Item Name convention for Memory tags in the Siemens PLC. For example...

M2.7 BOOL  MX2.7

MW10 INT MINT10

MD10 REAL MREAL10

MD10 DINT MDINT10

More on this topic can be found under the HELP section in the Archestra System Management Console under ITEM NAMING and FLAG BYTES.

your reply will help me a lot :)

regards

manasee

Your way is correct. It should be VD0->DB1,D0. Perhaps you have a wrong scalling or representing of type of tag. For your reference an example  http://fa.sammicomputer.co.kr/TECH/html/t002006.htm.

To add a item names in case of using DBs.

in case of BOOL: DB100.DBX0.0 -> DB100,X0.0

               INT:     DB100.DBW10 -> DB100,INT10

               DINT    DB100.DBD20 -> DB100,DINT20

               REAL   DB100.DBD30 -> DB100, REAL30

               STRING DB100.DBB40 (let's assume in DB we have 10 string until DBB49) -> DB100,STRING (40,10)...

Important thing is also on the same time to make corresponding selection of tag type.

Best regards,

Hristo Mihalev