Skip to Content

SiePortal

The integrated platform for your product selection, buying and support workflow - bringing together Industry Mall and Online Support.

SiePortalDeutsch

Search

Home
Support Support
{{(apiData.Support | filter:{'rank':1}:true)[0].title}} Support
- Menu temporary not available
- Menu temporary not available
- Menue temporary not available
- {{item.title}}

Products & Services
- Menu temporary not available
- Menue temporary not available
- {{item.title}}
Support Support
{{(apiData.Support | filter:{'rank':1}:true)[0].title}} Support
- Menu temporary not available
- Menue temporary not available
- {{item.title}}
MySiePortal MySiePortal
{{(apiData.MySiePortal | filter:{'rank':1}:true)[0].title}} MySiePortal
- Menu temporary not available
- Menue temporary not available
- {{item.title}}
Cart ({{apiData.CartCount}})

Navigation

Can't control S7-1200 from WinCC Unified

Created by: Specified at: 9/9/2021 5:25 PM (7 Replies)

Rating (0)

Thanks 1

8 Entries

9/9/2021 5:25 PM	Rate (0)
Specified Regular Member Joined: 6/8/2019 Last visit: 11/14/2024 Posts: 14 Rating: (0)	Dear All, I would like to seek support for the problem..WinCC Unified connect to S7-1200 able to monitor device only but cant control or change value. That so weird. I have enable input and deactivate read-only function ard but not effective.

Suggestion To thank Quote Answer

9/9/2021 5:29 PM	Rate (0)
Specified Regular Member Joined: 6/8/2019 Last visit: 11/14/2024 Posts: 14 Rating: (0)	pic Attachment Capture.PNG (758 Downloads)

Suggestion To thank Quote Answer

9/9/2021 5:30 PM	Rate (0)
Specified Regular Member Joined: 6/8/2019 Last visit: 11/14/2024 Posts: 14 Rating: (0)	pic2 Attachment Capture1.PNG (711 Downloads)

Suggestion To thank Quote Answer

9/13/2021 12:07 PM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 4/21/2025 Posts: 4406 Rating: (1480)	Hi, did you checked the follow points? - PLC DB variable: is the properties "Writable from HMI/OPC/Web API" set? - PLC Protection & Security -> Acess Level: HMI access? - Does the PLC write values on the variable? - drag and drop the PLC variable direct on the screen, could the Io field send values to the PLC?
	Denilson Pegaia Siemens Industry Sector Technical Support
Suggestion To thank Quote Answer

9/19/2021 5:27 PM	Rate (0)
Specified Regular Member Joined: 6/8/2019 Last visit: 11/14/2024 Posts: 14 Rating: (0)	Denilson Pegaia Hi, did you checked the follow points? - PLC DB variable: is the properties "Writable from HMI/OPC/Web API" set? - PLC Protection & Security -> Acess Level: HMI access? - Does the PLC write values on the variable? - drag and drop the PLC variable direct on the screen, could the Io field send values to the PLC? Dear Mr. Denilson PLC DB variable: is the properties "Writable from HMI/OPC/Web API" set? I though i got do it. - PLC Protection & Security -> Acess Level: HMI access? No PLC Protection Access level is no protection. - Does the PLC write values on the variable? No, the DB were use to connect with WinCC, no program affects it. - drag and drop the PLC variable direct on the screen, could the Io field send values to the PLC? For your infor, im using real PLC with firmware 2.2, quite old. Then don't know whether it is problem. Attachment Capture.PNG (657 Downloads)

Suggestion To thank Quote Answer

9/19/2021 5:28 PM	Rate (0)
Specified Regular Member Joined: 6/8/2019 Last visit: 11/14/2024 Posts: 14 Rating: (0)	Specified Denilson Pegaia Hi, did you checked the follow points? - PLC DB variable: is the properties "Writable from HMI/OPC/Web API" set? - PLC Protection & Security -> Acess Level: HMI access? - Does the PLC write values on the variable? - drag and drop the PLC variable direct on the screen, could the Io field send values to the PLC? Dear Mr. Denilson PLC DB variable: is the properties "Writable from HMI/OPC/Web API" set? I though i got do it. - PLC Protection & Security -> Acess Level: HMI access? No PLC Protection Access level is no protection. - Does the PLC write values on the variable? No, the DB were use to connect with WinCC, no program affects it. - drag and drop the PLC variable direct on the screen, could the Io field send values to the PLC? For your infor, im using real PLC with firmware 2.2, quite old. Then don't know whether it is problem. Attachment Capture2.PNG (589 Downloads)

Suggestion To thank Quote Answer

9/21/2021 12:37 PM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 4/21/2025 Posts: 4406 Rating: (1480)	Hi, and how about this test: - drag and drop the PLC variable direct on the screen, could the Io field send values to the PLC?
	Denilson Pegaia Siemens Industry Sector Technical Support
Suggestion To thank Quote Answer

9/21/2021 3:27 PM	Rate (0)
lHolzinger Bronze Member Joined: 10/5/2020 Last visit: 10/10/2023 Posts: 82 Rating: (10)	Hello, when I have problems with writing to a variable in a PLC, two things always come to my mind first. 1. do your variables have an initial value? It used to be that HMI variables could only change their value if they had an initial value. By now this should be fixed, but it's worth a try. 2. is the PG/PC interface of your PC configured correctly? (https://www.youtube.com/watch?v=k2kn9-C1oGk) during the first tests with a S7 1200 I could solve my problems with this. Hopefully you will find your solution in one of these suggestions

Suggestion To thank Quote Answer
This contribution was helpful to 1 thankful Users AutoGen_2807586

|

Share this page:

Share this page on...

Related topics by keywords:

SIMATIC WinCC Unified

Follow us on