S7 1200 PROFINET WITH VISUAL C#


I – Note: Derived from S7.Net Library

II – Example:

III – S7 1200/1500 Notes
An external equipment can access to S71200/1500 CPU using the S7 “base”
protocol, only working as an HMI, i.e. only basic data transfer are allowed.
All other PG operations (control/directory/etc..) must follow the extended protocol,
not (yet) covered by Snap7.
Particularly to access a DB in S71500 some additional setting plc-side are needed.
1. Only global DBs can be accessed.
2. The optimized block access must be turned off.
3. The access level must be “full” and the “connection mechanism” must allow
GET/PUT.

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