MatrikonOPC OPC Exchange

Ask The Experts – OPC Questions and Answers

  1. What do the letters “O-P-C” stand for?
  2. What is OPC?
  3. What is OPC UA?
  4. Because OPC is a standard, does that imply that all OPC Servers for a specific protocol are the same?
  5. What size is a typical OPC tag structure byte?
  6. Where do OPC timestamps they come from?
  7. What is the difference between OPC and DCOM?
  8. What is the “6 Minute DCOM Timeout”?
  9. How does OPC compare to DDE?

  10. Can I use OPC or DDE on Windows Vista?

  11. How do I get around a DCOM settings problem?

  12. How do I set it up so only certain people can access certain tags in the system?

  13. How can you get OPC Server data through a firewall?

  14. Does OPC work through a router?

  15. How do I make sure the changes I’m making in DCOM doesn’t open any security holes?

  16. How many OPC clients or servers can be installed on one PC?

  17. Is there a limit to the number of OPC clients that can connect to one OPC Server?

  18. Is there a limit to the number of OPC servers that can be connected to one OPC client?

  19. How fast is OPC?

  20. What is OpcEnum?

  21. What do I have to know to implement OPC Security?

  22. What options do I have to limit the client users who have access to my DCS?