It may contain trends, alarm summaries, pictures, or animation.Ĭopyright © 1995 - 2010, Cogent Real-Time Systems Inc. Human-Machine Interface: a graphical interface that allows a person to interact with a control system. Programmable Logic Controller: a small industrial computer that controls one or more hardware devices. There are also standards for alarms & events, historical data, batch data, and XML. OPC actually comprises several standards, the first and most important of which is OPC Data Access (OPC DA). Over a network, OPC relies on DCOM (Distributed COM), which was not designed for real-time industrial applications and is often set aside in favour of OPC tunnelling.
#KEPWARE SLOW CLIENT POLLING WINDOWS#
Since OLE is based on the Windows COM (Component Object Model) standard, under the hood OPC is essentially COM. The acronym "OPC" comes from "OLE (Object Linking and Embedding) for Process Control". And it can also be used to get OPC data into Linux or QNX. In addition to enhancing OPC server and client connections, the OPC DataHub can connect any OPC server or client to other applications as well, such as Excel, a web browser, or any ODBC database. Two OPC DataHubs can mirror data across a TCP network to provide OPC tunnelling. Thus it can connect to several OPC servers simultaneously, for OPC aggregation and OPC bridging. It is a combination OPC server and OPC client that supports multiple connections. The OPC DataHub is uniquely designed to do all of these tasks.
#KEPWARE SLOW CLIENT POLLING SOFTWARE#
Users can choose any OPC client software they need, resting assured that it will communicate seamlessly with their OPC-enabled hardware, and vice-versa. Software vendors simply include OPC client capabilities in their products and they become instantly compatible with thousands of hardware devices. Hardware manufacturers need only provide a single OPC server for their devices to communicate with any OPC client. The value of OPC is that it is an open standard, which means lower costs for manufacturers and more options for users. The OPC client uses the OPC server to get data from or send commands to the hardware. The OPC client software is any program that needs to connect to the hardware, such as an HMI. i triedby removing both devices from wincc and kepware but still. 1 or 2 devices are not active so the power of these devices were off during checking. The OPC server is a software program that converts the hardware communication protocol used by a PLC into the OPC protocol. Rating: (1) Dear all, I am using win cc 6.2 alongwith kepware for modbus rtu in a project the communication between wincc and opc server is too slow the number of used opc tags are approx 320 in single channel and total 7 nos devices. OPC is implemented in server/client pairs.
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