![]() ![]() Special handling has been added to support the native memory formats of the Omni Flow computer including string support. So Kepware's EX OPC server will not provide an HMI interface to interact with the UP750. Kepwares 32 bit Modbus RTU device driver works in conjunction with the OPC Server KEPServerEX, to provide data exchange between OPC Clients and Modbus RTU protocol compliant PLCs and Devices. The OPC server is there to interface (exchange data) with the field device. ![]() The OPC client is the software part that does the data collection or has the GUI that interacts with the field device. Just remember that an OPC server exists solely to talk to an OPC client (a different software function). Their EX server software runs in demo mode for 2 hours at a stretch, and can be restarted after the 2 hours expires, so it is an excellent tool for experimenting to see if it works. Kepware's been doing OPC servers for a long time now, so I suspect that they have some means of accomplishing this. Reads information like spindle speed and status from a spindle via an inverter (hitachi wj200) over modbus RTU. I'm trying to recall how Kepware EX addresses the device and whether it is done strictly by IP address, but can't recall. I suspect that the UP750 (is that a setpoint programmer?) uses a serial interface, but maybe it has an ethernet port (but having an ethernet port doesn't guarantee that the Modbus data is available on the port, either). I've used Kepware's OPC server on Modbus/TCP devices, but I haven't used it with Modbus RTU device over a serial interface, like RS-485.
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