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Another update: Got an answer from Uitronics support: "...The UMD doesn't support positioning via Modbus, the positioning can be done via CANopen or a high-speed output. Via Modbus you can do speed control as JOG operation, but not positioning. There's no reference or spec that says that positioning can be done via Modbus..." So, that's it. No positioning via Modbus. Looks like artificial restriction to me, somehow frustrating. Anyway, today I'm going to try setting target position using high-speed output, and do all the rest via Modbus. Still not sure what registers I should use for that, anyway. Probably register "JOG forward at node position" will finally start working if I set target position via high-speed output? As always, I'd be glad to see your ideas and suggestions, especially if you have some experience with positioning Unitronics servo.
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Main question you have to think about is: how fast do you need these discrete I/O to be? If you can tolerate 50-100 milisecond latency, then taking a Modbus TCP or Modbus RTU I/O gateways might be a less expensive alternative to Ethernet/IP. UniStream can be easily configured to send outputs and read inputs from a Modbus field I/O station. Setting up fieldbus in Unistream is almost trivial, no coding is necessary. Just define tags, set polling time or trigger bits, and it works auto-magically. Now, if your I/Os must be fast (response time in 5-10 milisecond range) or real-time, then you should look for CANopen fieldbus I/O.
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Hi, I am working with a 15" UniStream series PLC. This PLC has modules on its backplane(3xrs232 COM + 2xUIA-0006) and other modules added with two UAG-XKPxxx expanders.First expander(6xUIS-0800TC), Second expander(2xWide digital + 4UIA-0800n) The problem is that when I download the project into the PLC, it gives me an error because the App i/o configuration detects the UAG-XKPxxx modules but then PLC cannot find them. However, it does find the modules added after the expander. The project was developed in version 1.35 and has also been tested with the latest available version 1.36 Any ideas? We have downloaded the IOS files to all the modules, wiring checked...
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Can you try with a different USB stick? I've already encountered problems when the stick had corrupted sectors. I see that you already mentioned that you've tried 2 different sticks, but if both of them of the same brand, then maybe it doesn't like it. @NoamM, your assistance will be welcome (Maybe debug it, or get a verbose log)
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By Javier Firmapaz · Posted
Hello, I'm trying to connect my PC to a USC-B10-B1 (PLC with no HMI integrated) via USB and the following message appears telling me to update the firmware of the PLC in order to connect to it. Since this model doesn't come with a HMI i need to remotely update via a USB external storage device with an action file (.xml) that executes when pressing the CONFIRM button in the PLC However, when I plug in the USB device, the USB LED state in the PLC is still off, meaning the action file is not recognized. Pressing the CONFIRM button does nothing and there hasn't been created any log files in the USB when i plug it back into the PC to check. I have tried it with 2 USB devices and the result is the same. Both devices are 32GB of size and are formatted in FAT32. I also tried using the Remote Firmware Update Tool, again via USB, and with the target drive being also the USB where the files are. The downloading process starts normally but fails when it initiates the update. This is where i get stuck and don't know what else to try. Any help would be highly appreciated.
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