Post by timvh on Get Alarm status in Codesys ^{CODESYS Forge talk (Post)}
You are right, that you can use the GetState method, but it is not that simple. You first have to get a list of (filtered) alarms from the AlarmManager. You can find an example in Forge how to do this. See https://forge.codesys.com/prj/codesys-example/alarm-manager/home/Home/ Then you can go through this list to get the state of all the (filtered) alarms. See below the code which you could use. This is all based on the example from forge. Create a program: // This example shows how to access alarms via structured text. PROGRAM PLC_PRG VAR xInit : BOOL := TRUE; udiResult : UDINT; fbAlarmFilterCriteriaAll : FB_AlarmFilterCriteriaAll; fbAlarmManagerClient : FB_AlarmManagerClient; itfAlarmManagerClient : IAlarmManagerClient := fbAlarmManagerClient; xAlarm1 : BOOL; xAlarm2 : BOOL; xWarning : BOOL; iNrOfAlarmsInAlarmList : INT; iNrOfActiveAlarmsInAlarmList : INT; paitfAlarm: POINTER TO ARRAY [0..0] OF AlarmManager.IAlarm; iAlarmIndex : INT; eAlarmState: AlarmManager.AlarmState; END_VAR IF xInit THEN xInit := FALSE; fbAlarmManagerClient.itfAlarmFilterCriteria := fbAlarmFilterCriteriaAll; // register alarm client to get updated about alarm status / changes udiResult := AlarmManager.g_AlarmHandler.RegisterClient(itfAlarmManagerClient, 0, 0); END_IF // Polling the number of alarms udiResult := AlarmManager.g_AlarmHandler.GetActiveAlarms(itfAlarmManagerClient, parritfActiveAlarms => paitfAlarm, iCountActiveAlarms => iNrOfAlarmsInAlarmList); iAlarmIndex := 0; iNrOfActiveAlarmsInAlarmList := 0; WHILE iAlarmIndex < iNrOfAlarmsInAlarmList DO eAlarmState := paitfAlarm^[iAlarmIndex].GetState(); IF eAlarmState = AlarmManager.AlarmState.Active OR eAlarmState = AlarmManager.AlarmState.ActiveAcknowledged THEN iNrOfActiveAlarmsInAlarmList := iNrOfActiveAlarmsInAlarmList + 1; END_IF iAlarmIndex := iAlarmIndex + 1; END_WHILE See below some details about the function blocks: One function block should implement the IAlarmFilterCriteria interface. This can be empty except a few methods. FUNCTION_BLOCK FB_AlarmFilterCriteriaAll IMPLEMENTS AlarmManager.IAlarmFilterCriteria Method implementation (others related to interface are empty) METHOD AreAllAlarmClassesSelected : BOOL AreAllAlarmClassesSelected := TRUE; METHOD AreAllAlarmGroupsSelected : BOOL AreAllAlarmGroupsSelected := TRUE; METHOD GetPriorityFrom : USINT GetPriorityFrom := 0; METHOD GetPriorityTo : USINT GetPriorityTo := 255; The other function block should implement IAlarmManagerClient and get a reference to the FB which implements the IAlarmFilterCriteria FUNCTION_BLOCK FB_AlarmManagerClient IMPLEMENTS AlarmManager.IAlarmManagerClient VAR_INPUT itfAlarmFilterCriteria: AlarmManager.IAlarmFilterCriteria; END_VAR Method implementation (others related to the interface are empty) METHOD GetFilterCriteria : AlarmManager.IAlarmFilterCriteria // see VAR_INPUT for filter GetFilterCriteria := itfAlarmFilterCriteria; Off course you have to add the AlarmManager to your application and add some alarms to it.
Last updated: 2025-09-02

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Post by exkrim19 on Unable to connect to this device ^{CODESYS Forge talk (Post)}
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