# mCheckExistingFilteredAlarm

## `AlarmManagerBuffer.mCheckExistingFilteredAlarm` (METH)

METHOD mCheckExistingFilteredAlarm : BOOL

This method checks whether the alarm already exists in the alarm buffer

InOut:

| Scope  | Name                          | Type    |
| ------ | ----------------------------- | ------- |
| Return | `mCheckExistingFilteredAlarm` | `BOOL`  |
| Input  | `udiInternalID`               | `UDINT` |
| Input  | `udiAlarmClassID`             | `UDINT` |
| Input  | `udiAlarmGroupID`             | `UDINT` |