S
Sam
I don't know about facades of openness or resistance to real open protocols. For me it is a matter of what makes sense. Do I implement a
system with an operating system that is unique to what my support staff current maintains? There needs to be a very good reason to do that. What I find is that there isn't enough justification for that, because the common one, the one that is running on hundreds of desktops in the organization is good enough. The same logic
follows from there. If the object system that comes with that operating system is adequate then I will use it rather than going with another technology.
Obviously, there are different definitions of what "open" means. One definition is that the technology is widely used. OPC is being used by a number of companies, like many commercial SCADA
vendors. I consider it "open" because before the device interface for each commercial system was unique to each vendor.
As far as Ethernet and TCP/IP is concerned the argument is over. People can argue against whether or not they are best suited for controls networking, but the same logic applies. If the commodity technology (Ethernet/TCP/IP) is good enough then it will prevail - as it is already.
Sam
system with an operating system that is unique to what my support staff current maintains? There needs to be a very good reason to do that. What I find is that there isn't enough justification for that, because the common one, the one that is running on hundreds of desktops in the organization is good enough. The same logic
follows from there. If the object system that comes with that operating system is adequate then I will use it rather than going with another technology.
Obviously, there are different definitions of what "open" means. One definition is that the technology is widely used. OPC is being used by a number of companies, like many commercial SCADA
vendors. I consider it "open" because before the device interface for each commercial system was unique to each vendor.
As far as Ethernet and TCP/IP is concerned the argument is over. People can argue against whether or not they are best suited for controls networking, but the same logic applies. If the commodity technology (Ethernet/TCP/IP) is good enough then it will prevail - as it is already.
Sam