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2.6.2
Control
The GRD150 can indicate the status of circuit breakers and disconnectors via the MIMIC
configuration picture on the graphical LCD display (HMI) and the status information from them
can be transmitted to the remote control system. The GRD150 can also control switchgears such as
circuit breakers or disconnectors opened and closed over the remote control system. The status
information and control signals are transmitted over the serial bus. Binary inputs and outputs for
control are configured by PLC function.
On the MIMIC picture, the object device is selected and its open/close control is locally performed
via the push-button keys on the front panel.
The following devices are controlled:
Circuit breaker (CB)
Disconnector switch (DS)
3 State disconnector switch (EDS)
On / Off switch (COS)
Furthermore the maximum 8 devices are indicated as indication only.
Figure 2.6.3 shows the overview of select and control operation logic. The GRD150 selects an
object device according to the remote, local or PLC command signal and controls the object
device by the remote, local or PLC control output. The control output is performed by a binary
output (BO) assigned by PLC function.
Device provision information: The sinbol defined on MIMIC configuration picture.
+
Local
&
Local select
Remote
&
Remote select
PLC select
&
Local control
&
Remote control
PLC control
Paret state of device
No response of device
Scheme logic
Figure 2.6.4 shows the typical scheme logic of CB close select and control operation. The scheme
logic of CB open operation and other device's operation (DS, EDS, etc.) is similar to it.
CB_ENABLE shows CB is on the MIMIC diagram.
CB_SELECTED is given by CB_ENABLE and select command from PLC/panel/remote system
Object device
Judgment of select
≥ 1
condition
Local, Remote or PLC
Judgment of control
≥ 1
condition
Local, Remote or PLC
≥1
Figure 2.6.3
Overview of Select and Control Operation Logic
⎯
Input / output
Max. number of device
2State / 2Control
2State / 2Control
3State / 4Control
1 output
Object device provided
Device selection
&
&
+
1
Change of device control output:
Var: Pulse output
Fix: The output continues to the
device operation.
⎯
107
6 F 2 S 0 8 4 2
1
5
2
4
Device control
&
Device control
≥1
output
S
&
F/F
R
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