Proven OPC Server when using PCO OPC agent

hello MII community,

our customer would like to know which OPC server is proven in production run when using SAP PCO OPC agent. I would like to hear your recommendation.

the customer feels that OPC servers differently react, so they would like to know proven ones in production run for SAP PCO OPC DA, HDA agent. the customer is automotive components supplier and they would like to use for their data acquisition in fore-end process of steel machining / heat treatment, etc., so frequency of data acquisition is rather often, they think.(not yet decided yet, though)

thank you for your attention.

Sincerely, Shiroh Kinoshita - SAP Japan Manufacturing team