# mCheckExistingAlarm

## `AlarmManagerBuffer.mCheckExistingAlarm` (METH)

METHOD mCheckExistingAlarm : BOOL

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

InOut:

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