Configure a control module to perform a customized alarm roll-up

The Alarm Unit dynamo (HP_Alarms) shows alarm count information. This dynamo can be configured to perform alarm roll-ups in modules matching the normal breakdown of Area > Unit > Equipment Module > Module or in modules that do now match the normal breakdown of Area > Unit > Equipment Module > Module.

The steps below show how to configure a control module to perform a customized alarm roll-up.

Open the module in Control Studio.
Add a CALC block to the module.

Add these parameters at the module level:

Parameter	Description
PRI	Represents the module's highest alarm's priority.
CUALM	Represents whether the module's highest alarm is a new alarm.
NALM	Represents the highest alarm's current state.
COUNT	Counts the total number of annunciated alarms. That is, it counts all alarms that are Active/Unacknowledged, Active/Acknowledged, and Inactive/Unacknowledged.

Add the following code to the module:

Pn := 255;
Cn := 0;
Nn := 0;
Count := 0;

Pt := '//MODULE/ALARMS[1].PRI';
Ct := '//MODULE/ALARMS[1].CUALM';
Nt := '//MODULE/ALARMS[1].NALM';
IF ((Nt > Nn) OR (Ct * (Cn - 1) < 0) OR ((Nt = Nn) AND ((Ct != 0)=(Cn != 0)) AND (Pt > Pn))) THEN
Pn := Pt;
Cn := Ct;
Nn := Nt;
Count := Count + 1;
ELSE
IF (Nt > 0) OR (Ct > 0) THEN
Count := Count + 1;
END_IF;
END_IF;


'^/PRI' := Pn;
'^/CUALM' := Cn;
'^/COUNT' := Count;
'^/NALM' := Nn;

Replace MODULE with the module name.

If you want additional modules included in the alarm roll-up, duplicate the following code for each module:

Pt := '//MODULE/ALARMS[1].PRI';
Ct := '//MODULE/ALARMS[1].CUALM';
Nt := '//MODULE/ALARMS[1].NALM';
IF ((Nt > Nn) OR (Ct * (Cn - 1) < 0) OR ((Nt = Nn) AND ((Ct != 0)=(Cn != 0)) AND (Pt > Pn))) THEN
Pn := Pt;
Cn := Ct;
Nn := Nt;
Count := Count + 1;
ELSE
IF (Nt > 0) OR (Ct > 0) THEN
Count := Count + 1;
END_IF;
END_IF;

Replace each MODULE with the appropriate module name.

Save the module.
In DeltaV Operate Configure, open the HP_Alarms' Dynamo Properties dialog.
Select the Custom radio button.
Browse to the module's PRI, NALM, CUALM, and COUNT parameters.
Click OK to save the changes and close the dialog.