Good morning,

I'm doing a program to automate a process. It's an S7 1200 1212FC and KTP 700 Basic. I use TIA PORTAL v17 and the test I am doing are witch the PLC and HMI connected via ethernet with a switch to my PC. 

I want to use an existing HMI to show information about the process to workers, changing bewtween screens depending on in which case or state the procsess is.

For example, if I put a sensor and its input is true, change the screen active, and when another sensor, later, will be on, change again. How I am doing this in my pc, I am simulating the inputs changing the values of the DB manually.

I tried in several ways, linking tags and db from the plc to HMI tags, using Activate Screen and Activate screen by number. Tried to use Job mail box and area pointer and some proof that didn't work at all.

I would like to why or where I am mistaking, because I want to use almost 15 differents screens and I don't have another choice like touching the screen.

Any help would be useful.

Thank you.

I tried to change which screen image is showed in the HMI depending which value my DB has.

I created a DB INT, linked to a HMI Tag, Acquisition Mode: Cyclic Continuous.

Then, I use Move to take the number from the DB and one trigger to complete the operation.

I tried to simulate a S7 1211 DC/DC/RLY and it works properly, but with my real PLC, 1212 FC DC/DC/RLY, compile, download to device and monitoring values and HMI is static all the time.

New question published by Constantin/siemens is split to a separate thread with the subject Change the screen on HMI when a variable changes in the plc.

Best regards
The Helping Hand