Connecting Devices Using Modbus Protocol

This article describes how to configure communication with devices using Modbus protocol. Simple and robust, Modbus has since become a de facto standard communication protocol, and it is now a commonly available means of connecting industrial electronic devices (see Wikipedia). Rapid SCADA supports Modbus RTU, ASCII and TCP modes.

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Connecting Devices Using OPC Standard

This article describes how to configure communication with devices using OPC standard. OPC is designed to provide a common bridge for the software and process control devices from different manufacturers (see Wikipedia). Rapid SCADA supports the following OPC specifications:

  • OPC DA (Data Access) to read and write current device data.
  • OPC AE (Alarms & Events) to receive event notifications.

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