Add an Accumulator

Equipment

The name of the equipment associated with the accumulator. Select a name from the drop-down list of existing equipment definitions, or enter a name.

There is a limit of 254 characters across the Equipment and Item Name fields, including any separating periods (.).

Item Name

The name of the item with which the accumulator is associated.

Items form part of an equipment hierarchy. They can be used to associate accumulators, tags, alarms and trends with a particular attribute of a physical piece of equipment (see Items).

There is a limit of 254 characters across the Equipment and Item Name, including any separating periods (.).

Note: When defining an item name, avoid using the Reserved Words. If you use any of these, an error message will display when you compile your project.

Name

The name of the accumulator. Enter a value of 79 characters or less.

Cluster Name

The name of the cluster that runs the accumulator. This field needs to be defined if your project has more than one cluster.

You can leave this field blank in a multi-cluster system if cluster replication is enabled (see the parameter [General]ClusterReplication).

Trigger

The Cicode expression (or variable tag) to trigger the accumulator. If the result of the expression (in this field) is TRUE, accumulation starts. If the result of the expression (in this field) becomes FALSE, accumulation stops. Enter a value of 254 characters or less.

The frequency with which the trigger is checked is controlled by the [Accumulator]WatchTime parameter.

Totalizer Inc

Any Cicode expression (or variable tag) to add to (increment) the Totalizer variable while the Trigger condition is TRUE. Enter a value of 254 characters or less.

Totalizer

The variable (tag) that contains the totalized value. Enter a value of 254 characters or less.

On startup, this value is read. Each time the trigger is checked and while the trigger is TRUE, the value in the Totalizer Inc field is added to the local copy of this Totalizer variable. The new Totalizer variable is written back to the I/O Device at a frequency determined by the [Accumulator]UpdateTime parameter.

For example, if you configure an accumulator for a motor, and Totalizer Inc is the current (amperage) used by the motor, then Run Time will contain the time (in seconds) that the motor has run, No. of Starts will contain the number of times the motor was started, and Totalizer will contain the total current used by the motor. The average current used by the motor is Totalizer/Run Time.

Run Time

The variable (tag) that contains the run time (in seconds). Enter a value of 254 characters or less. On startup, this value is read. Then the local copy of this variable is incremented (while Trigger is TRUE) and the variable is written back to the I/O Device at a frequency determined by the [Accumulator]UpdateTime parameter.

No. of Starts

The variable (tag) that contains the number of starts (that is, the number of times the trigger changes from FALSE to TRUE). Enter a value of 254 characters or less. On startup, this value is read. Then the local copy of this variable is incremented and the variable is written back to the I/O Device at a frequency determined by the [Accumulator]UpdateTime parameter.

Comment

Any useful comment. Enter a value of 48 characters or less.

Area

The area to which the accumulator belongs. Only users with access to this area (and any required privileges) will be able to perform operations on the accumulator. For example, if you enter Area 1 here, operators need to have access to Area 1 (plus any required privileges) to perform operations on the accumulator. Enter a value of 16 characters or less.

Privilege

The privilege needed by an operator to perform operations on the accumulator (by using accumulator functions). Enter a value of 16 characters or less.

Project

The project in which the accumulator is configured.