Push-based Active OPC Server for Connecting to SCADA Systems
Moxa's Active OPC Server Lite is a free software package that operates as an OPC driver for HMI/SCADA systems. General OPC servers typically use a polling method to connect to Ethernet I/O devices, which send commands continuously to collect relevant data. Moxa's Active OPC Server Lite, with its non-polling architecture offers active (or "push") communication with Moxa's ioLogik series of Ethernet I/O products to HMI/SCADA systems, providing instant I/O status reports by using "Active Tags." Using event-driven active tags results in an I/O response time that is 7 times faster than other OPC Server packages, and reduces network traffic by 80%.
User-defined Modbus Addressing for Painless Upgrades of Existing Systems
To control an input or output channel of a remote Ethernet I/O device running the most general Modbus/TCP protocol requires specifying the Modbus address of those input and output channels. The ioLogik E1200 offers the greatest flexibility with its user-defined Modbus/TCP addressing. With this approach, the ioLogik E1200's addressing is compatible with all other Modbus/TCP devices, and the channels that are being used can be managed sequentially and require less polling.