Siemens S7/TIA v16: WinCC: trying to display value on HMI.....

[Mas01]

Hi
I'm trying to display a value on the HMI.

In monitor mode on the code, I can see that value, but on the HMI , after downloading, it is "0.000"

It is a real number, I don't know what I'm doing wrong.
Anyone know?
Thanks

 

[RVaughan]

In the first picture you are writing to an M address, then you show the indicator linked to an HMI tag which is synchronized to a DB tag. Separate memory locations.

 

[L D[AR2P#0.0]]

As previously advised, ditch the use of m flags. Delete them from the symbol table.

 

[A_G]

It looks like on the HMI it is in format 9.999
I think you need to change it to format 99.999
Is Laser 2 working? Maybe copy the field from Laser 2 so you can copy the format

 

[Mas01]

YES!!!!!!!!
At last, it's working thanks to your help!
Yes, sorry @LD_AR2...I used the M-references because I was following an online tutorial and the presenter was using M-references.
I am a newbie at S7 to please excuse my ignorance.

Anyway, I updated the code as per the picture attached, recompiled, and it's working now.
Great help on this forum.

 

[chud]

Next time from the db just drag the tag onto the hmi page. The link will automatically be created and an io field created

 

[Mas01]

Next time from the db just drag the tag onto the hmi page. The link will automatically be created and an io field created

I never knew you could do that. Thanks

 

[Mas01]

Also, I guess I should get rid of these M-tags too, right ? (Circled in green) and define them in a DB.

 

[chud]

Well where are you getting the values from? no need to write %md and then to the db registers. can use the Direct input registers from the sensors. Unless you want to manipulate the read value

 

[Mas01]

Well where are you getting the values from? no need to write %md and then to the db registers. can use the Direct input registers from the sensors. Unless you want to manipulate the read value

Sorry I don't understand this comment due to my lack of S7 experience. However, to add info, md8 is the result of reading the raw value analogue input, then norm_x and scale_x, resulting in a laser distance measurement in millimetres.

 

[Rob...]

Yes define them in DB, you could also move the raw value into a DB location.

Also you might consider putting a P_Trig (One shot) instruction after the save value, as right now you overwrite the save value every scan the input from the HMI is true.