SiePortal

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

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

KTP1200 Communication Problem

7/7/2025 6:30 AM	Rate (0)
Shebi87 Bronze Member Joined: 10/22/2011 Last visit: 8/28/2025 Posts: 308 Rating: (1)	Hello, I am working on a project in which I have to connect 3 S7-1200 PLCs with one new KTP1200 Basic. The PLCs were already indtalled without HMI. Now I am creating a new test project in TIA Portal V17 with 2 PLCs CPU1214C and one KTP1200 Basic. when I make connections of the HMI with PLC_1 and simulate the HMI, then it works and communication is OK. but when i add second connection PLC_2 in HMI, then it dooes not communicates with any PLC and communication with PLC_1 also breaks what may be the reason?

Suggestion To thank Quote Answer

7/8/2025 8:37 AM	Rate (0)
Murof Platinum Expert Joined: 8/3/2009 Last visit: 9/1/2025 Posts: 16284 Rating: (1930)	Hello Shebi87 It should work to connect the simulation also to more than one PLC at a time. Check this basic FAQs: https://support.industry.siemens.com/cs/ww/en/view/88193789 https://support.industry.siemens.com/cs/de/en/view/109748099 Bye Murof
	If this Information really helps, you could use the Rate function
Suggestion To thank Quote Answer