parameter CtlModel defines which one of the two control models is used. The
control model "direct with normal security" does not require a select whereas, the
"SBO with enhanced security" command model requires a select before execution.
The command sequence for a command with control mode SBO with enhanced
security is shown in figure
195, with control mode direct with normal security is
shown in figure 196.
Client
Reservation
logic
SCSWI SXCBR
RES_GRT = TRUE
EXE_CL
operateAck/AddCause = 0
SEL_CL = TRUE
SELECTED = TRUE
selectAck/AddCause = 0
POSITION = 00, timeStamp
POSITION = 10, timeStamp
cmdTermination/AddCause = 0
RES_GRT = FALSE
operateAck/AddCause = 0
requestedPosition = 10
opRcvd = TRUE
opOK = TRUE, tOpOk
POSITION = 00, timeStamp
POSITION = 10, timeStamp
select
RES_RQ = FALSE
cmdTermination/AddCause = 0
SELECTED = FALSE
SEL_CL = FALSE
tSelect
tReservation
Response
tExecutionFB
RES_RQ = TRUE
IEC16000083=1=en=Original.vsdx
IEC16000083 V1 EN-US
Figure 195: Example of command sequence for a successful close command
when the control model SBO with enhanced security is used
Section 11 1MRK 506 382-UEN A
Control
396 Line distance protection REL650 2.2 IEC
Technical manual
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