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PLC . Control Logix 5550 Ethernet Module. OPC Ingear as Sever OPC Link As Client Intouch. We have 730 variables in 8 topics where : Tags In Arrays : 495 (in 14 arrays) Tags in PID format : 168 (14 PID definitions) Individuals : 67 We are experimenting a response of around 5 second from the field , to the HMI. Is terrible. Somebody have worked with this kind of topology ? Thanks Javier GARCIA Harper International