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I can read TAG but i don't write

9/14/2022 10:09 AM	Rate (0)
blyshchak Regular Member Joined: 12/23/2019 Last visit: 1/16/2025 Posts: 26 Rating: (1)	Hello, this is the first time this happens to me. I have a project with V17 with approximately 6000 tags. I have the Runtime installed in a virtualized service. So far everything is correct, but when I try to write TRUE for FALSE or vice versa. It doesn't make any changes. It is very curious because if I connect online to the PLC and change from there, the variable changes. A visual change in HMI in IE Field, when I manually type value it turns RED and back white. Does anyone know what else I can check? Thank you very much

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9/14/2022 10:26 AM	Rate (0)
Stefan Arcularius Platinum Expert Joined: 1/21/2013 Last visit: 3/14/2025 Posts: 3650 Rating: (576)	Hi blyshchak, would you please provide more information? Are you using the update 4 for TIA Portal V17? What PLC is used? Do you use secured connection? In case of an S7-1200 or S7-1500, is the write access enabled for the variables you try to access? Kind regards Stefan

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9/14/2022 11:08 AM	Rate (0)
blyshchak Regular Member Joined: 12/23/2019 Last visit: 1/16/2025 Posts: 26 Rating: (1)	Hi Stefan, sorry!!! look at i have V17 UP4 PLC 1507S AN:6ES7 672-7AC01-0YA0 Attachment plc_gea.jpeg (331 Downloads)

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9/14/2022 11:19 AM	Rate (0)
Stefan Arcularius Platinum Expert Joined: 1/21/2013 Last visit: 3/14/2025 Posts: 3650 Rating: (576)	Hi blyshchak, thanks for the information. Your configuration looks okay. Which PLC interface is used for your connection? On a software controller at the moment, only the interface assigned to the PLC would be working. Do you have an alarm control in your project? Try to use an alarm control to view the system alarms. You can also try to get some error information using RTIL Trace Viewer. Kind regards Stefan
	Last edited by: Stefan Arcularius at: 09/14/2022 11:21:13 Link to system manual added
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9/16/2022 1:54 PM	Rate (0)
rdoliveira Gold Expert Joined: 4/26/2012 Last visit: 3/12/2025 Posts: 1629 Rating: (185)	Hello, you can also check if you have not selected, HMI monitor client, in your logged in user, this would make it read-only. good luck Attachment Capturar.PNG (305 Downloads)
	"Always make a backup before performing any tests and check the best time to do so. Obrigado.
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This contribution was helpful to 1 thankful Users Stefan Arcularius