Hi everyone,

We're encountering a warning in the TIA Selection Tool stating,"Ring structure is incomplete."

I've attached images in the attachment. Could you please check if the connections are correct or incorrect?

The connection layout is as follows:

• S7-1500H Primary (X1.P1) → ET 200MP (1) P2
• ET 200MP (1) P1 → ET 200MP (2) P2
• ET 200MP (2) P1 → ET 200MP (3) P2
• ET 200MP (3) P1 → S7-1500H Secondary (X1.P1) (Closes the Ring)

Looking forward to your feedback. Thanks

Dear, T S T Support

issue is resolved by referring the S7-1500H connection Manual which was available on Forum,

previously i have connected according to this, 

S7-1500H Primary (X1.P1) → ET 200MP (1) P2ET 200MP (1) P1 → ET 200MP (2) P2ET 200MP (2) P1 → ET 200MP (3) P2ET 200MP (3) P1 → S7-1500H Secondary (X1.P1) (Closes the Ring)

 but later, by referring to manuals, 

S7-1500H Primary (X1.P1) → ET 200MP (1) P2ET 200MP (1) P1 → ET 200MP (2) P2ET 200MP (2) P1 → ET 200MP (3) P2ET 200MP (3) P1 → S7-1500H Secondary (X1.P1) S7-1500H Secondary (X1.P2) → S7-1500H Primary (X1.P2) (To Closes the Ring)

 two PLC were not connected, that's the reason there was a warning that Ring structure is incomplete.

Thankyou for your time