DataHub Scripting : Version 6.4
	Special Gamma Functions for DataHub Scripting

`datahub_write`

datahub_write — assigns a value to a DataHub point.

Syntax

datahub_write (pointname, value [, force, quality, timestamp])

Arguments

pointname: The name of the point, as a string.
value: The value to be assigned to the point—a number, string, or array.
force: Causes the write to occur even if the value and quality are the same as the value currently in the DataHub. This is useful if you are changing only the time stamp of the point. Enter t to force, or nil to not force.
quality: The quality of a point, as a number. You can use the constants OPC_QUALITY_* found in GetQualityName by requiring that file like this: require("Quality.g");.
timestamp: The time stamp in Windows time. Windows time is a floating point number that can be obtained in Gamma by requiring Time.g like this: require("Time.g");, then calling the functions GetCurrentWindowsTime, UnixTimeToWindowsTime, or PointGetWindowsTime.

Returns

t on success, otherwise an error message.

Description

This function is the same as the Gamma force function, but the pointname is a string, so the symbol never needs to be created in the Gamma engine. This can be used to reduce Gamma engine load when using a large number of points.


datahub_read		edit_file