![]() ![]() This is possible because all PascalSCADA ports comes with mechanism that only allows one protocol to use communication port. Another advantage of this design is to put two or more different protocols using the same communication port simultaneously, both on the same application. An real application that can be done using this architecture, is the association of a TTCP_UDPPort with a COMServer (devices that acts as a gateway of RS-232/485/422 to TCP/IP), to by example, communicate with a Modbus RTU device that is far, over the Internet. One communication port can be used by one or more protocol drivers, simultaneously.Ĭommunication ports aren’t implemented together with protocol drivers to allow more flexibility to the system. Communication ports are the way used by the protocol drivers to send and receive data.
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