SubscriptionGetTimestamp

Reads the specified timestamp of a subscribed tag.

Syntax

SubscriptionGetTimestamp(iHandle, sAttribute )

iHandle

Integer handle of the subscription to read from.

sAttribute

Attribute of the tag to read. Supported Attributes are:

• Timestamp - The timestamp when the tag last changed. It is default value used when this argument is not specified.
• QualityTimestamp - The timestamp when quality of the tag last changed.
• ValueTimestamp - The timestamp when value of the tag last changed.

Return Value

The requested timestamp for a subscribed tag. On error, 0 (INVALID TIMESTAMP).

Related Functions

SubscriptionGetInfo, SubscriptionGetQuality, SubscriptionGetValue, SubscriptionGetTag

Example

TIMESTAMP theTime = SubscriptionGetTimestamp(hSub, "ValueTimestamp");

TIMESTAMP theTime = SubscriptionGetTimestamp(hSub);

See Also

Tag Functions