Greetings, everyone! I am currently using a Windows 10 PC with a FTView ME Station 10.00 installed. My .mer file has a version of 6.00 and has been functioning smoothly for quite some time. However, after a recent disconnection and reconnection, I am encountering several faults, with the main issue being related to writing values to specific items. The error messages include "Problem writing value '0' to item '.....ChangeScreenAltTab'" and "Problem writing value '1' to item '.....ChangeScreenAltTab'". Additionally, there are multiple errors indicating that certain items are no longer available. Upon further investigation, I have confirmed that the communication between the HMI (PC) and PLC is functioning correctly, and the HMI program is correctly configured with the appropriate IP address. Despite this, the issue persists. If anyone has any insights or suggestions on how to troubleshoot this issue, it would be greatly appreciated. Thank you in advance (TIA) for your assistance.
It seems that one or more tags listed in the project's Global Connections are no longer present in the PLC system.
Hey there! It sounds like your .mer file may not be fully compatible with the version of FTView ME Station you're running. I've encountered a similar issue before and was able to resolve it by converting the .mer file to a compatible version. FactoryTalk offers a 'Application Conversion Tool' that might be useful in this process. If you haven't tried it yet, consider checking the integrity of your .mer file using ME's Tools > Application Manager > Verify Application. It might help pinpoint if there are any corrupted screens or missing items. Other than that, ensure that you don't have multiple HMIs trying to write to the PLC at the same time which could cause conflicts. Just a few suggestions based on my personal experience. Good luck!
Hey there, it sounds like a frustrating situation. One possibility could be that there are some corrupt or invalid tags in your application, triggering these error messages. You might want to consider cross-verifying all your tags in HMI program and ensure that their addresses match with the PLC. Also, double check the ChangeScreenAltTab command to determine if it's being properly utilized. Lastly, since this seemed to happen after a disconnection, it might be worthwhile to double check your network settings and perhaps even reinstall or update the FTView. Hope you find the culprit soon!
Hi there, it seems like you've done some good initial troubleshooting. Since the communication between HMI and PLC is okay, there's a chance the problem might lie within the project itself. It’s possible that the tags linked to the 'ChangeScreenAltTab' have been deleted or altered in the PLC program. I'd suggest checking your physical connections, then verifying your HMI tags and addresses to ensure they match the PLC program. Don't forget to also confirm the access mode of your tags, they should be read/write if you intend to write values to them. If all this checks out, you might want to consider loading an older version of your .mer file to see if the issue persists - it could be a version mismatch issue. I hope that helps!
Hi there! Your issue sounds a bit tricky, but let's see if we can troubleshoot it. From your description, it seems like the 'ChangeScreenAltTab' item is where the problem lies. It's possible that this item got corrupted or removed in the reconnection process, which could be the cause of your errors. To fix this, you could try recreating the item and see if that clears the fault. If that doesn't work, another suggestion would be to restore an older version of your .mer file (if you have a backup), as this version might not have the same issue. Lastly, there might be an issue with the compatibility of FTView ME Station 10.00 running on Windows 10 with your particular .mer file. In the worst scenario, you might need to consider upgrading to a newer version of FTView. Good luck and I hope this helps!
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