Hello,

I encountered a problem while filtering alarms in WinCC Unified. I have two inputs: From and To. Every time I selected a date and monitored it in the alarm filter of the alarm control, something really strange happened — it seemed like the values had a 12-hour difference.

I tried everything, but nothing seemed to work until we created the following function in javascript. After that, the filtering started working correctly. This function is called when we press the button to set the filtering in the alarm control.

export function Alarm_Time_Filter(Year, Month, Day, Hour, Minute) {
let FilterString = ' ';
let iFilterYear = Year;
let iFilterMonth = Month;
let iFilterDay = Day;
let iFilterHour = Hour;
let iFilterMinute = Minute;
// Replace 0 with 1 for day and month
if (iFilterMonth === 0) {
iFilterMonth = 1;
}
if (iFilterDay === 0) {
iFilterDay = 1;
}
// If hour is less than 12, add 12 to hour and increment month by 1
if (iFilterHour < 12) {
iFilterHour += 12;
} else {
// If hour is 12 or more, add 12 to hour
iFilterHour += 12;
// If hour goes beyond 23, wrap around using modulo 24
if (iFilterHour > 23) {
iFilterDay += 1;
iFilterHour = iFilterHour % 24;
// Optionally, adjust day and month here if needed
}
}
// Convert to String
let sFilterYear = iFilterYear.toString();
let sFilterMonth = iFilterMonth.toString().padStart(2, '0');
let sFilterDay = iFilterDay.toString().padStart(2, '0');
let sFilterHour = iFilterHour.toString().padStart(2, '0');
let sFilterMinute = iFilterMinute.toString().padStart(2, '0');

FilterString = sFilterYear+'-'+sFilterMonth+'-'+sFilterDay+'T'+sFilterHour+':'+sFilterMinute+':00.000Z';
return FilterString;
}

Hello Stefan :) Yes. My alarm control was configured for UTC-12 time zones. I changed and redo the HMI screen but the problem continued. I do not have time to go deeper on it, so I decide to develop the script and it works at the end.