Simatic Wincc 7.5 SCADA system

[Parthiban balasubramnian]

I am utilizing both HMI and SCADA for my project. Both HMI and SCADA have identical tags. When I modify the tag value on HMI, it is reflected in SCADA. However, if I change the value through SCADA, the HMI values do not change. I am curious to know why this is happening. If anyone has any insights, please inform me.

 

[mk42]

That's very odd.

Does the value change in the PLC if you change it in the SCADA? Is it possible that the SCADA IO fields/tags/connection are configured as read only?

 

[Parthiban balasubramnian]

yes but when ever refresh the scada screen it goes to hmi value.