Toshiba GR200 Series Instruction Manual page 457

Control hierarchy
It is important that the user understand the meaning of the terms 'control-right' and 'control-
hierarchy' in connection with the functioning of the control and monitoring applications in the
sub-station automation system (SAS) and the sub-station control and monitoring system
(SCMS). For instance, when we wish to operate a device (such as a piece of switchgear or
others), the system has the device forbidden to operate if the system is unable to give a 'control-
right' for the device using the 'control-hierarchy'. Figure 3.3-1 depicts the control-hierarchy;
the control-hierarchy is made of three control-levels, two selector-switches, and three control-
points. Either control command of three control-points is permitted so that the other
commands will be forbidden in the system. On this account, no collision of control-points exists
within the system.
Network level
Selector switch
(43R)
Station level
Selector switch (43BCU‡ )
L
R
Bay level
Control levels Selector switches
Figure 3.3-1 Control hierarchy and selector switches
‡Note: The L|R key on the IED is used for the 43BCU switch. The L|R key
can be programmed during manufacture using the PLC function before shipment,
but it can also be programmed by the user.
§Note: The user can implement a hierarchy by programming the PLC. For more
details, see Chapter
Control-point in RCC
Communication
RCC
ON/OFF operation on LCD(MIMIC)
Remote (R)
Operation
KEY
Switchgear and others
Control points and positions of selector switches
PLC function
- 436 -
Control-point in OWS/EWS
EWS
EWS/OWS
Control-point in LCP
Local (L)
Control-right
.
6F2S1915 (0.46)
OWS
GRZ200 (Soft 031 & 032)