Manual: 8.4. Static Alarm Limits
In addition to the dynamic limits computed by IHM, normal static limits are supported by IHM. The green area should enclose normal operational values, yellow the dangerous ones, orange the critical ones and red the failure ones. You may use any or all of these colored areas as you choose. Through IHM you will then be alarmed when the measurement value crosses any defined limit value towards a worse state. The colored regions can be defined for each tag by specifying the boundaries between the colored regions. Please see the images below for an illustration.

