Delta OPC User Manual 2.1 Basic Concept 2.1.1 First Step toward Delta OPC Delta OPC provides configurators and an OPC server for users so that the users can conveniently set and connect a device (e.g. a PLC). Users write a setting into a config file (an .mdb file) by means of a configurator in an OPC server. Client software gets the names of the data items (corresponding to registers in a device) in the config file by means of the OPC server, and then sends a request to the OPC server for accessing the data in registers in a device which corresponds to the names of the data items in the config file.
The OPC server sends a request by means of the communication format set by the configurator and a communication port to the device for accessing data. As shown in figure 2-1, after the users go though the process, they can read the data sent to the client software. Figure 2-1 Framework 2.2 Guide to Starting Delta OPC and Introduction of the Environment in Delta OPC 2.2.1 Starting Delta OPC After Delta OPC is installed successfully, the shortcuts to Delta OPC - SerialPort Configurator and Delta OPC - Ethernet Configurator will be automatically created on the desktop and the Start menu.
If users want to connect a device by means of a serial port, they have to use Delta OPC - SerialPort Configurator. If the users want to connect a device by means of Ethernet, they have to use Delta OPC - Ethernet Configurator. After the users click a Delta OPC configurator, it will be started, as shown in figure 2-2. No matter what configurator the users start, the initial screen which appears is as shown in figure 2-3. There are only some basic functions available in a configurator window. 2-2