Changing Cmore change screen with DoMore and Keeping track of current screen

[fluidpowerman]

I am using a DoMore and a Cmore HMI.  I want to have the plc change the cmore screen if for example if an alarm bit is set I want the HMI to go to an alarm screen.  Then the operator will reset the alarm bit and return to which ever mode I was in ie. Auto or Manual.  I understand how to set up the settings in the Cmore. I am just not sure how to keep everything in synch. I am currently using the Cmore hmi to tell the plc which part of the program to go to by comparing the address (N100) which is tagged as the screen name.  Where I am confused is I am told that you have to keep updating the screen number address to keep every thing in synch.  Any ideas how I might write my ladder to accomplish this?  I would appreciate any input 

Thank
Bryan

[ADC Product Engineer]

The only trick to this is that when you put the screen number to change to in the PLC to Screen tag, then watch the Screen to PLC tag for a match with that screen number.   After it matches, then set the PLC to Screen tag to a number that is not a used screen or zero.  That way when you put a new valid screen number in next time you want the screen to change C-more can see that the value has changed.

It is really that simple.

[plcnut]

I prefer to do all of my screen changes on the PLC side. I have attached a screenshot of the HMI program block from a really small project to show how I did/do it.

[franji1]

I have attached a screenshot of the HMI program block from a really small project to show how I did/do it.

Modular Programming at its best!

[fluidpowerman]

Got It!  Thank you automation Kings!