About the Object Scripts tab

Script name

(not applicable)

The name of each script primitive associated with the object. Each attribute is appended to the primitive name for each script.

None

Configure execution order

ScriptOrder

An ordinal number indicating within a script execution group the script's relative order to other scripts.

None

Aliases

Aliases, AliasReferences

An array of names and their associated attribute references used in a script or expression.

Aliases = None; AliasReferences = Supervisory, User

Declarations

DeclarationsText

A set of valid QuickScript .NET declarations using dim.

None

Execution type

ScriptExecutionGroup

The type of script execution that occurs during object execution: Startup, On Scan, Execute, Off Scan and Shutdown.

None

Expression

Expression

A string that controls the script execution for all trigger types except Periodic when Execution Type is set to Execute. When the expression entered meets the trigger condition (While True, On True, On False, Data Change and While False), the script is executed. Click the ellipse button to access the Attribute Browser.

None

Trigger type

TriggerType

The function associated with the expression that together determines when the script is executed.

Read-Only

Trigger period

TriggerPeriod

Indicates the period at which to trigger an Execute type script when Trigger Type is set to Periodic. If set to zero (0), the script executes at the scan period of the host AppEngine. The script always executes at least once immediately after going onscan. The time format is: days hh:mm:ss.fffffff.

Read-Only

Deadband

DataChangeDeadband

Only used with Trigger Type Data Change. Specifies the amount the expression value must change before the script is executed.

Supervisory, User

Runs asynchronously

RunsAsync

Sets whether the script is to be run synchronously (cleared) or asynchronously (checked).

Read-Only

Timeout limit

ExecuteTimeout.Limit

Indicates the timeout limit, in milliseconds, for an asynchronous script. (For synchronous scripts, the timeout for the host AppEngine is used. A value of zero (0) disables the timeout. This value is accurate within the resolution of the configured scheduler scan period of the hosting AppEngine.

Read-Only

Report alarm on execution error

ExecutionError.Alarmed

If enabled, an alarm will be triggered when the script engine encounters an error condition in the script's last execution.

None

Priority

ExecutionError.Priority

See Alarm Attributes in the Attributes Help.

Supervisory, User

Historize script state

State.Historized

If enabled, the system will historize the state of the object script.

None

Script box

StartupText

OnScanText

ExecuteText

OffScanText

ShutdownText

Displays the script being developed. Must be a valid QuickScript .NET startup, on scan, execute, off scan or shutdown script. The script is parsed for language-specific key words, script functions, internal references (referencing attributes of the object that the script is assigned to) and external references. Syntax errors are raised, including usage of non-existing script functions.

You can access the Script Function Browser and the Attribute Browser by clicking the appropriate button in the script box toolbar.

None