Cannot write tags to a 1512SP-F but it works with a 414

Hi All,

I'm facing a issue with wiring tags to a S17-1512SP.

As soon as I enter the e new value in the field I want to change, the field turns red and the setting is not changed…

I found these related topics:

• https://support.industry.siemens.com/forum/nl/en/posts/v17-can-t-write-tags-to-plc-internal-works-fine/289128
• https://support.industry.siemens.com/forum/nl/en/posts/wincc-unified-io-field-doesn-t-write-value-to-the-plc-tag/279315

I checked all suggestions mentioned in these topics (see screenshots in the attachment) but they did not solve my problem. I can change values using a S7-414, so I think we need to search the issue in the Proxy PLC/Project. But I am out of ideas

What am I missing here?

P.S. Everything is updated to the last firmware/software version

Hello MartijnD

you also have to check if your User that you use in RT do not have the "Activate HMI Monitor Client" runtime right.

If it is so then you will see also a thin coloured line around your screen and you cannot input any values to IO fields or similar...

Bye Murof