As the middleware between SCADA software and system hardware, an OPC Server allows Windows programs to communicate with industrial equipment (such as a PLC, DCS, or RTU) by translating the data into OPC format. Its open standard architecture means hardware vendors don’t need to worry about supporting different kinds of SCADA systems, lowering hardware manufacturing costs. In addition, an OPC Server also provides users with more options and allows them to choose any OPC client software they need.
Traditional OPC Servers vs. Moxa's Active OPC Server
Traditionally, OPC servers only support the "Pull" architecture for I/O devices. This means that your SCADA system would use a continuous polling method to collect relevant data. Moxa's Active OPC Server with non-polling architecture supports the standard OPC protocol, but also offers event-driven, active (or "Push") communication with I/O servers to provide real-time signals when the I/O status is changed. You will be able to efficiently reduce data traffic and make use of this optimal bandwidth-saving solution.
By adopting Moxa's Active OPC Server, users don't need to create tags one by one. With ioAdmin, you can save time by uploading I/O configurations automatically.
Moxa Active Ethernet I/O + Active OPC Server + SCADA
= Seamless Active Ethernet I/O Solution
Moxa is committed to delivering the most innovative solutions such as our Active OPC Server. Moxa's Active OPC Server bridges the gap between Active Ethernet I/O hardware and SCADA software with its easy-to-use I/O tag generating function. In the past, SCADA users had to write a proprietary program to receive "active" messages. But with Active OPC Server, users only need to define the OPC client's IP address in their SCADA software and Active OPC Server will automatically generate I/O tags using Moxa's ioAdmin utility.
Active OPC Server can now be downloaded from Moxa's website to turn your existing "Pull" architecture into "Push" architecture.