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198
Apparatus control
With the inputs (S_R, S_S, L_L) that are obtained, the desired operator place can be se-
lected. It has a built-in priority with Local as highest, Station as intermediate, and Re-
mote as lowest priority. When two or more inputs are set at the same time, the higher
priority prevails. The inputs S_R and S_S have pulse inputs, but the L_L requires a
steady signal. Figure 84 shows the logic:
S_R
S_S
L_L
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If the operator place selection is used without any priority and if the outputs REMOTE/
STATION/LOCAL can be set independent of each other, the inputs REMOTE/STA-
TION/LOCAL on COMCON can be used. See configuration example in the section of
"Operator place selection" in "Configuration".
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The purpose of the reservation and selection function is primarily to transfer interlock-
ing information in a safe way and to prevent double operation in a bay, switchgear, or
complete substation. The section of "Reservation function" in "Configuration" de-
scribes the method and the meaning of the inputs and outputs of BAYCON.
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The input EXCH_IN and output EXCH_OUT are used for information exchange be-
tween BAYCON elements, when more than eight apparatuses in the same bay are used
for control. The inputs and outputs of these elements are connected to each other in a
loop as shown in figure 85.
The reservation and selection function has several bits available to request other BAY-
CONs to be reserved. These BAYCONs reply with an acknowledge through the same
information exchange.
Only BAYCONB, and BAYCONF have this functionality.
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