Toshiba GR200 Series - 4.3.1 SOFTSW controlling; (i) Command blocking (CBK)

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 735 -
Figure 4.3-1 shows the eight switches and their controller functions. The statuses of the S43
switches are stored in the IED non-volatile memory; hence, the IED can retrieve their status
while power is not being supplied to the IED.
CMDBLK
(CBK)
SOFTSW1
(S43-01)
Switches for
special purposes
General purpose
switches
ILKBYP
(ICB)
SCBYP
(SCB)
SOFTSW2
(S43-02)
SOFTSW3
(S43-03)
SOFTSW61
(S43-61)
Figure 4.3-1 Software switches (S43s) and their controller
The SOFTSW function can control a number of S43 software switches separately. To
simplify the explanation provided below only the SOFTSW1 function is discussed. The features
provided in CBK, ICB, SCB and SOFTSW2–61 switches are similar to the SOFTSW1 switch.
Tips: The user can operate CBK, ICB and SCB without user programming. Jump to
section 4.3.5 where we discuss how to map their signals for IEC61850
communication. When the user wishes to program the SOFTSW functions using
the S43-01–S43-61 switches, the user is required to read from section 4.3.2
onwards.
4.3.1 SOFTSW controlling
(i) Command blocking (CBK)
When the user wishes to avoid the control of devices by mistake during test and maintenance,
the user can use the command blocking function so that mal-operation can be avoided. The
execution of command blocking is available from the IED front panel. Additionally, the IEC
61850 standard provides command blocking (CmdBlk) for remote operation and the CBK
function is defined at the logical node (LN) given in IEC 61850-7-1 (Edition 2.0). Thus, the IED
can override all commands received when the command blocking function is engaged from the
local-end and the remote-end. With regard to the command “CmdBlk” from the remote-end,
the command is received at the input point “CBK_CONROL_REQ”, as shown in Table 4.3-2.
For SOFTSW1 operation, the user should set the scheme switch [CBK-EN] to On.
CBK_STATE
(522001 000A011001)
Input
Output
CBK logic
Blocking of all commands is
performed.
All control commands must be blocked simultaneously
Reception of CMDBLK
CBK__CONTROL_REQ
522001 700A016D08
To “Select condition logic” and
“Operate condition logic” †
Figure 4.3-2 Logic “CBK” and response “CBK_STATE”
†Note: The user is required to map a communication signal to the input-point. For
mapping, see section 4.3.5. The “CBK_STATE” signal is used in control
applications so that control applications can determine their operational