Working with Alarm History

When the monitoring BOOL variable turns ON (or OFF depending on your setting preference), or when alarm data is written to the monitoring variable, the alarms are listed together with its trigger date/time.

Example Operation

Setting Workflow

1. Add Variables
2. Add Alarm Groups
3. Add Alarms
4. Set up Parts

Add Variables

Project Explorer : [Variables] ➞ [All Variables]

Add the following variables.

Variables properties :

[Name]	[Data Type]
Var1	[BOOL]
Var2	[INT]

Add Alarm Groups

Project Explorer : [Alarm/Events] ➞ [All Alarms]

Add the following alarm group.

Alarm Group (Name : AlarmGroup1) properties :

Initial Value

Add Alarms

Project Explorer : [AlarmGroup1] ➞ [Bool Alarm]

Add the following Bool alarm.

Bool Alarm properties :

Row	Tab	Property	Value
1	[Basic]	[Alarm Type]	[HiHi]
		[Trigger Condition]
		[Variable]	[Variable] [Name]: Var1
		[Message]	Pressure abnormality.

Project Explorer : [AlarmGroup1] ➞ [Level Alarm]

Add the following Level alarm.

Level Alarm properties :

Row	Tab	Property	Value
1	[Basic]	[Message]	Temperature abnormality.
		[Alarm Type]	[Hi]
		[Value]	80
		[Deadband]	0
		[Variable]	[Variable] [Name]: Var2

Set up Parts

Project Explorer : [Screen Design] ➞ [Screens] ➞ [Screen1]

Drag and drop the following objects from the [Tool Chest] to the screen.

Alarm Summary object (Name: AlarmSummary1) properties : A-1

Tab	Sub Tab	Property		Value
[Function]	[Basic]	[Alarm Group]		AlarmGroup1
		[Sort]	[Column]	[Date]
			[Order]	[DESC]