Muhammad Magdy

Thats right, but the user who send data from visual basic to plc manually via button  and the communication protocol is profibus  about the last question depend on how often the user press button to send this data. The project is concrete batching plant pragram ... The visual basic program is consider database program with sql server database take the recipe contents (cement- water- aggregates) by kg i want to send this data from visual basic and sql server db to plc and another data like timers of belt and mixer running and parameters of the plant this data also in visual basic program the user also can edit it in visual basic and will send it to plc by button in visual basic this is all i want thank you very much for your efforts

Sorry mr pop there are misunderstanding . Consider that i created a complete program in simatic manager and complete program in visual basic . So, when i write data in visual basic in textbox i want send this data to variables in simatic manager via button 

I think don't exceed 25 variables

Thank you for reply me, yes i initializing plc variables in an static program that will be downloaded to the CPU and i created a visual basic data base program that contains data i want to transfer this data to variables in the simatic manager program via button in visual basic 

yes i initializing plc variables in an static program that will be downloaded to the plc and i create a visual basic data base program that contains data i want to transfer this data to variables in the simatic manager program via button in visual basic 

how i can transfer data from visual studio 2010 ultimate visual basic language to variables in simatic manager siemens s7-300