Appendix A - Description of the ‘Functional Constraints’ (FCs):

FC

Semantics

Description

ST

Status information

represents a status information whose value may be read, substituted, reported, and logged but can not be written.

MX

Measurands (analogue values)

represents a measurand information whose value may be read, substituted, reported, and logged but can not be written.

CO

Control

represents a control information whose value may be operated (control model) and read.

SP

Setpoint

represent a set-point information whose value may be controlled (control model) and read.

SV

Substitution

represents a substitution information whose value may be written to substitute the value attribute and read.

CF

Configuration

represents a configuration information whose value may be written and read.

DC

Description

represents a description information whose value may be written and read

EX

Extended definition

represents an extension information providing a reference to a name space. Extensions are used in conjunction with extended definitions of LNs, DATA, and DataAttributes in 61850-7-3 and IEC 61850- 7-4. Value may be read.