Hi,

Im trying to develop a s7-1200 <> Ktp700 project.
For this project i want stop the program based if the HMI is “not there” anymore

I thought something about planned tasks or vb scripts but the basic series do not support those.
Is there a way, that i can make even a simple a watchdog bit communication?
or some special function i cant seem to find?

best,

 

Hi! Thats one super quick responds.
And indeed! never knew about this function!

Super handy / Simple

https://support.industry.siemens.com/cs/mdm/109794203?c=39382950155&lc=en-BG

Thanks!
 

Great, but how can we access the "Coordination" area pointer?
Thank you in advance.

Thomas

Hello Tomy;

To monitor the status of an HMI you must use a "coordination area pointer" in WinCC: start by configuring the area pointer as shown here:

https://support.industry.siemens.com/cs/bg/en/view/109794203/43421366283?dl=en

The coordination area pointer in WinCC uses a length of 1 Word. For example:

https://support.industry.siemens.com/cs/bg/en/view/109794203/39382950155

In Step 7 you read the 3 LSB (least significant bits) in your program, at the address you set for the area pointer, Bit 2 of that address will tell you if the H'MI is ocnnected or not. Bit 3 sends a pulsed lifebit that you can follow to ensure the HMI is still active.

Hope this helps,

Daniel Chartier

Just 2 screen shots., on on the HMI → Connections and then the Area pointer tap. 
→ activate it, and for now i just connected it to a test word tagg in a db on my plc.