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3.17.11.3
L/R control access
Four different Local/Remote control access scenarios are possible depending on the
selected station authority level: “L,R”, “L,R,L+R”, “L,S,R” and “L, S, S+R, L+S, L+S+R”. If
control commands need to be allowed from multiple levels, multilevel access can be
used. Multilevel access is possible only by using the station authority levels “L,R,L+R”
and “L, S, S+R, L+S, L+S+R”. Multilevel access status is available from IEC 61850 data
object CTRL.LLN0.MltLev.
Control access selection is made with R/L button or CONTROL function block
and IEC 61850 data object CTRL.LLN0.LocSta. When writing CTRL.LLN0.LocSta IEC
61850 data object, IEC 61850 command originator category station must be used by
the client, and remote IEC 61850 control access must be allowed by the relay station
authority. CTRL.LLN0.LocSta data object value is retained in the nonvolatile memory.
The present control status can be monitored in the HMI or PCM600 via Monitoring >
Control command with the
LR state parameter or from the IEC 61850 data object
CTRL.LLN0. LocKeyHMI.
IEC 61850 command originator category is always set by the IEC 61850 client.
The relay supports station and remote IEC 61850 command originator categories,
depending on the selected station authority level.
3.17.11.4
Station authority level “L,R"
Relay's default station authority level is “L,R”. In this scenario only local or remote
control access is allowed. Control access with IEC 61850 command originator
category station is interpreted as remote access. There is no multilevel access.
IEC 61850
remote
IED
IEC 61850
remote
REMOTE
LOCAL
OFF
IEC 61850
remote
IED
IEC 61850
remote
IEC 61850
remote
IEC 61850
remote
IED
Figure 97: Station authority is “L,R”
When station authority level “L,R” is used, control access can be selected using R/L
button or CONTROL function block. IEC 61850 data object CTRL.LLN0.LocSta and
CONTROL function block inputs CTRL_STA and CTRL_ALL are not applicable for this
station authority level.
Table 183: Station authority level “L,R” using R/L button
L/R control
L/R control status
Control access
R/L button
CTRL.LLN0.LocSta CTRL.LLN0.MltLev
L/R state
CTRL.LLN0.LocKey
HMI
Local user
IEC 61850 client
1
Local
N/A
FALSE
1
x
Remote
N/A
FALSE
2
x
Off
N/A
FALSE
0
1
Client IEC 61850 command originator category check is not performed.
Basic functions
1MRS758755 C
166
REC615 & RER615
Technical Manual