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Input or Output
Input signal to control
Status of device
function from PLC logic
Select & operation control
Interlock condition
Configurable counter
Synchronism check
Δf check
Output signal to PLC logic
Control output
from control function
Events
2.6.2.2
Double Command Blocking
Double command blocking function can be provided. This function prevents from control
multiple devices. It is to block select command while the previous control is in progress to realize
secure control. The control operation is blocked during device selection, control execution and
device operating.
Double command blocking occurs during selected device, the selected device is canceled.
Double command blocking occurs during operating device, the operation is continues.
2.6.2.3
Control inhibition
The whole control operation except trip command by relay scheme can be blocked to prevent
incorrect operation when system testing or inspection, etc. The control operation is blocked by
setting the switch [OPLOCK] to "LOCK". This status is not indicated anything in default setting.
"OPELOCK" signal is for block the trip command or status indication using by PLC function.
2.6.2.4
Software Interlock
Software interlock is to block control output when the interlock condition is failure. It can be
provided by using the PLC function for any control direction of every device.
Software interlock is valid when the signal for interlock (i.e. CB_OPILOCK) is on. It is given
from device status, device alarm, etc. from BI using PLC function.
2.6.2.5
Interlock bypass
Interlock bypass mode can be provided. This function is to control the switchgear devices forcibly
and is available when the interlock condition is not valid caused by communication failure or
unavailable, etc.. The interlock bypass mode can be set from the MIMIC and the upper systems.
This mode is retained until reset or DC supply "OFF".
Table 2.6.4
Control logic by PLC
Information
N/O and N/C contact information introduced by BI(Binary
input) is assigned to a device status signal.
In case of automatic control or local control panel a control
switch signal (BI signal) is assigned to a select & operation
control signal.
Interlock condition programmed by BI signals, etc. is
assigned to a non-established signal of the interlock.
Signal introduced by BI signal such as 30F and Pulse WH,
etc. is assigned to a configurable counter.
Synchronism check execution signal is assigned to "1" signal
continuously when CB closed by synchronism check.
Δf check execution signal is assigned to "1" signal
continuously if Δf check is included during synchronism
check above.
Control output signal for each device is assigned to a binary
output signal (BO signal).
Events of select & operation control, select completion,
select fail, interlock fail, etc. are outputted.
⎯
⎯
111
6 F 2 S 0 8 4 2
Signal assign
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