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204
Apparatus control
puts of a given direction, SEL_OPEN or SEL_CLOS. After it has received the
FDB_SEL signal, it proceeds with an EXECUTE command, which activates both
EXE_OPEN and EXE_CLOS.
In case of the select-before-execute-open or -close principle, SWICON receives only a
SELECT signal (that is, without the OPEN and CLOSE directions). Now it activates
both the SEL_OPEN and SEL_CLOS selection outputs. After receiving a FDB_SEL
feedback select, it waits for the EXECUTE command. This must now come together
with the OPEN or CLOSE direction to activate either EXE_OPEN or EXE_CLOS. The
connections between SWICON and the output board are shown in figure 88.
Apparatus 1
FDB_SEL
From BAYCON
SELECT
OPEN
From
CLOSE
COMCON
EXECUTE
CANCEL
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Before a selection output is activated, SWICON checks the blocking (BLK_OPEN/
CLOS) and interlocking (INT_LOCK) inputs. After activation of the selection outputs,
the selection timer (T_SEL) starts. When the feedback select signal does not come in
time, SWICON sets the SEL_ERR output. After the execute outputs are activated, it
sets the CMD_ERR if the position indication does not indicate a start in the position
change, before the time T_START has elapsed.
Automatic operation is included in SWICON. It has an input for bay information con-
cerning permission for automatic operation (AU_OP_V). It also has an output that in-
dicates permission per apparatus (AU_OP_P).
SWICON
SEL_OPEN
SEL_CLOS
EXE_OPEN
EXE_CLOS
SELECTED
>1
To HMI
OPEN
&
To output board
CLOSE
&
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