For every controller, you can adjust the values "Physical MIN" and "Physical MAX", thereby limiting the physical values of the channel.

If the actual physical value exceeds this limit, for example, the channel value will be limited to the value entered in the "Physical MAX" field.

The same applies to the lower limit. If the actual value falls below the lower limit, the physical value of the channel is limited to the value defined in the "Physical MIN" field.

Transgressions above and below the limits are displayed in the H/L (High/Low) status indicator in the HMI, at the top right on the configuration page for analog channels.