Functionality; L/R Control Access - ABB RELION 620 Series Technical Manual

Section 3
Basic functions
3.17.10.2
3.17.10.3
176

Functionality

Local/Remote control is by default realized through the R/L button on the front panel.
The control via binary input can be enabled by setting the value of the LR control
setting to "Binary input". The binary input control requires that the CONTROL
function is instantiated in the product configuration.
Local/Remote control supports multilevel access for control operations in substations
according to the IEC 61850 standard. Multilevel control access with separate station
control access level is not supported by other protocols than IEC 61850.
The actual Local/Remote control state is evaluated by the priority scheme on the
function block inputs. If more than one input is active, the input with the highest
priority is selected.
The actual state is reflected on the CONTROL function outputs. Only one output is
active at a time.
Table 178: Truth table for CONTROL
CTRL_OFF CTRL_LOC
TRUE any
FALSE TRUE
FALSE FALSE
FALSE FALSE
FALSE FALSE
1) If station authority is not in use, the CTRL_STA input is interpreted as CTRL_REM.
The station authority check based on the IEC 61850 command originator category in
control command can be enabled by setting the value of the Station authority setting
to "Station, Remote" (The command originator validation is performed only if the LR
control setting is set to "Binary input"). The station authority check is not in use by
default.

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
Input
CTRL_REM
1)
CTRL_STA
any any
any any
TRUE any
FALSE TRUE
FALSE FALSE
1MRS757644 F
Output
OFF = TRUE
LOCAL = TRUE
STATION =
TRUE
REMOTE = TRUE
OFF = TRUE
620 series
Technical Manual