Hi 

I am writing a small program to control the level of a tank, the control is variable and the upper and lower settings are input on an HMI, is there a way to stop the wrong limits being input?

for example normally it would be High Level Setting 75, Low Setting 55 but i want to safe guard against something like this High Setting 55 Low Setting 75 ,if that makes sense.

Currently using TIA Portal V15.1 

Thanks in advance

Desert Monkey

Hi 

I am writing a small program to control the level of a tank, the control is variable and the upper and lower settings are input on an HMI, is there a way to stop the wrong limits being input?

for example normally it would be High Level Setting 75, Low Setting 55 but i want to safe guard against something like this High Setting 55 Low Setting 75 ,if that makes sense.

Currently using TIA Portal V15.1 

Thanks in advance

Yes.

Go to HMI IO field tag properties and set desired limit  /range for input  tag value.

I used such options in HMI inorder to ensure the inputs are desired one.

attachment for your reference.

Tia portal v15.1

Hello.

Some options are available to you depending if scripting is available for the HMI or if you are authorized to code in the PLC.

A pure HMI task that is a bit limiting but helpful, is shown in the attached animation. A tag is configured with limit. That limit is determined by another tag.