Value Timestamping

The IEC780IP driver pushes values to Plant SCADA as they are received via the DRI.

Depending on the device, the driver may receive timestamped or non-timestamped value updates. When a timestamp value is not provided by a device, it can be manufactured by the driver based on the time the update is received. This behavior can be manipulated by the driver parameter Data Interrogation Parameters.

The way Plant SCADA processes timestamp values can also be impacted by the type of input tags you use. See Timestamp Handling for more information.

The timestamp value the driver pushes to Plant SCADA is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601 (UTC).

By default when a timestamped value is received, the values for timestamped and non-timestamped tags will be updated. That behavior can be changed by the Data Interrogation Parameters ini parameter.