A major alarm is a real alarm and indicates an error. In the
record, you can specify an upper and a lower limit: for example for AI and AO
record you have to configure the fields HIHI and LOLO (and additionaly the
fields HHSV and LLSV have to be set to "MAJOR").
An operator should react to a major alarm and solve the problem. On displays , an error is shown in red.