Hello Sir our customer want to know what kind of database can PLCnext controller access to? Thanks a lot!
In theory, any database. However, the ease or difficulty of doing this will depend on what database, where the database is hosted, whether there is suitable client software for that database for the selected PLCnext Control device (or if you can compile one, or write one yourself), what needs to be read/written to the database, from which application, at what frequency, etc. etc. For example, sqlite would fall into the „easier“ category, while access to many others would be harder - but probably not impossible - to implement. For PLCnext Engineer, there is an existing FB library that implements clients for SQLserver and MySQL databases.
Thank you for your reply! what’s more, could we store the data to SQlite in the PLCnext firstly ,and then SQlite database interact with an external database, then we can get dual backup data, does this way is available?
[quote]could we store the data to SQlite in the PLCnext firstly ,and then SQlite database interact with an external database, then we can get dual backup data[/quote]Not without additional software, sorry.