Navnag

Hello

Here is an Extract from S7-200 Smart Manual :

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CPU communication connections
The CPU supports the following maximum number of simultaneous, asynchronous
communication connections:
● Ethernet programming port: The CPU provides the following connections:
– HMI/OPC connections: Eight dedicated HMI/OPC connections.
– PG connections: One programming device (PG) connection.
– Peer-to-peer (GET/PUT) connections: Eight connections to support S7-200 SMART
CPUs or network devices. 

Communication drivers

WinCC Flexible
In the WinCC Flexible software package, you can select the required "Communication driver"
with the following menu selections:
● Communications
● Connections table
In the "Connections table", select the "SIMATIC S7 200 SMART" driver. If the SMART driver
is not in the list, select the "SIMATIC S7 200" driver.

TIA portal
In the TIA portal, you can select the required "Communication driver" with the following menu
selections:
● HMI tags
● Connections
In "Connections", select the "SIMATIC S7 200" driver. 

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What I understand from this is that the HMI / OPC that you plan to use should support S7-200 Protocol on Ethernet.

So Theoretically at least if the OPC supports this then it should work.

Hope this helps

Cheers
Navnag

 How to communication between s7-200 smart with s7-200 smart  plc using get/put ethernet......

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