ProSoft Technology PLX81-EIP-61850 - Manual (Page 113)

PLX8x-EIP-61850 ♦ Communication Gateway Reference
Server to
IEC 61850 Client User Manual
ProSoft Technology, Inc. Page 113 of 167
July 2, 2015
Direct Control with Normal Security
Direct control with normal security is commonly used for operations that act on
local data (such as a LED test) or on data for which return information is not
supervised (for example switch on a heating). It uses the Operate and
TimeActivatedOperate services.
{This diagram and text has been taken directly from the IEC 61850 Standard
document.}
SBO (Select Before Operate) with Normal Security
SBO control with normal security first verifies that the Data Attribute is not
currently selected by a different Client; that it is operable; and that the operation
is not restricted. If this is verified, then the Operate request should proceed. It
uses these services:
 S
ELECT
 C
ANCEL
 O
PERATE
 T
IME A CTIVATED O PERATE
SBO with normal security Data Attributes are generally Controllable single point
(SPC) attribute types. These are things such as:
 R
UN D IAGNOSTICS
 T
RIGGER RECORDER
 R
ESET RECORDER MEMORY
 C
LEAR MEMORY