Hello,

i need to know how to convert my S7 addresses (300/400) to Modbus addresses, examples:

S7 address: DB40.DBX97.0 what is the converted modbus adress ?

The same question for this example: DB40.DBW4 what is the converted modbus adress ?

Or what is the formula ?

Thanks in advance if someone can help !

Sorry, i'm not an automatician.. That's what i want to do:

I use a Kepware Server in order to collect data from S7-300 or S7-400 and then send it to a supervision software through OPC.

So the data are sent to the Kepware Server through the DBxx.DBXxxx.x format or DBxx.DWx format.

I wish to use the Modbus/TCP general Protocol for all the devices (TSX, S7,...) so how can i do this ?

For example, with a TSX-PREMIUM athe address %MW13000:X1 becomes 413000.1 in Modbus format, i'd like to do the same thing with the S7...

thanks !

New question published by Farshad Kouhizadeh is split to a separate thread with the subject Send Real(floating) values to client with MODBUS/TCP.

Best regards
Min_Moderator

Hello 

In Siemens modbus addresses are flexible & configurable so equivalent addresses are depend on which blocks used for same & starting address for conversion.

it is also depend on whether addresses are holding type or coil type or any other modbus register type.

so you need proper information on that then only you can tress the equivalent addresses for modbus 

if you are not working in siemens then you better take assist from some siemens programmer or expert for same.

Regards

Ganesh Dighe