Hi all
A little background first:
I use OPC in several applications to connect HMI software and database software to various PLCs. This kind of OPC is actually called "OPC DA" (DA = Data Access), and is probably the most common variant of OPC out there. The connection is from OPC Server to/from OPC Client.
There are other variants though, one is "OPC DX" (DX = Data Exchange).
OPC DX allows direct OPC Server to Server data exchange which in turn means that two PLCs can exchange data with each other without any OPC Client in the setup.
Here is the problem:
I can find plenty articles that explains what OPC DX is in broad terms.
And I can find some articles on how to write applications that support OPC DX in C or C++.
But I cannot find ANY hands-on documentation how to do this as an enduser.
In Simatic Net I cannot find any reference to OPC DX at all. But OPC DX must be possible because there is a "DX" selection available in the Configuration Console.
In Rockwell RSLinx there is NO reference to OPC DX at all (I dont know if RSLinx supports OPC DX though).
Anyone ?
A little background first:
I use OPC in several applications to connect HMI software and database software to various PLCs. This kind of OPC is actually called "OPC DA" (DA = Data Access), and is probably the most common variant of OPC out there. The connection is from OPC Server to/from OPC Client.
There are other variants though, one is "OPC DX" (DX = Data Exchange).
OPC DX allows direct OPC Server to Server data exchange which in turn means that two PLCs can exchange data with each other without any OPC Client in the setup.
Here is the problem:
I can find plenty articles that explains what OPC DX is in broad terms.
And I can find some articles on how to write applications that support OPC DX in C or C++.
But I cannot find ANY hands-on documentation how to do this as an enduser.
In Simatic Net I cannot find any reference to OPC DX at all. But OPC DX must be possible because there is a "DX" selection available in the Configuration Console.
In Rockwell RSLinx there is NO reference to OPC DX at all (I dont know if RSLinx supports OPC DX though).
Anyone ?