Sampled Values Basics

The service called Sampled Values is designed to transmit current and voltage measurement data via Ethernet as defined in 9-2. Strictly there is also a way to do that using other connection mechanism as defined in the IEC 61850-9-1 but this is not described nor supported in OpenSCD.

Sampled Value Streams do not use TCP/IP but use multicast mechanism instead to be send to all communication participants in the same LAN/VLAN. Its sending (publishing) and its use (subscription) are therefore completely separated. That has its effect also on the configuration of Sampled Value related communication in the SCL.

Publishing: Sampled Value Control Block (SampledValueControl)

The configuration of Sampled Value publishers is done in the SCL element SampledValueControl and its referenced DataSet element. The reference to its DataSet is set through the attribute datSet in the SampledValueControl element.

NOTE: SampledValueControl must reside in the LN0 element and SampledValueControl and its referenced DataSet must have the same parent

A configuration of the publisher has three basics steps:

1. create control block: Create the element SampledValueControl or import SCL with pre-existing SampledValueControl elements
2. create data set: Create element DataSet in the same parent as the SampledValueControl and add data FCDA to it
3. combine control block and data set: Set the datSet attribute within the SampledValueControl element

Publishing: Configuring Sampled Values with OpenSCD

1. Create Sampled Value Control Blocks and its DataSet
2. Edit Sampled Value Control Blocks and its DataSets

Subscription: Basics

See Subscription basics

Subscription with OpenSCD

See Subscription complete Sampled Value Stream