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228
Apparatus control
also use the solution in figure 108 if the close command from the synchrocheck relay is
connected via a binary input to the SY_OK input on SWICONA. Alternative 3 in figure
111 shows the connection to an external synchronization equipment, for example, type
RES 010.
For the external synchronization relay, the close command is normally handled outside
the control terminal. At the close command from the operator, COMCON activates the
EXECUTE output and SWICONB the SEL_CLOS and EXE_CLOS outputs. SWI-
CONB has two inputs SY_RUN and SY_FAIL, which need the status information of
the synchronization sequence. The SY_RUN signal can be connected from the synchro-
nization relay, so it will be activated when the synchronization relay is in progress and
waiting for its close command.
The feedback signal of the close command in the figures 109 and 110 is used to start
the supervision timer T_START, which supervises the movement of the drive, that is,
the position change from open (01) -> 00.
COMCON
CLOSE
EXECUTE
SWICONB
CLOSE
EXECUTE
SEL_CLOS
&
SY_RUN
SY_FAIL
Timer
INPUT
&
)LJXUH &RQQHFWLRQ H[DPSOH IRU H[WHUQDO V\QFKURFKHFN HTXLSPHQW DQG WKH DSSDUD
WXV FRQWURO PRGXOHV DOWHUQDWLYH
BI/BO
&
U1
U2
ON
&KDSWHU
&RQWURO
External synchrocheck
or synchronization
equipment
SYNCH
CLOSE
CB
close
coil
+
+
99000341.vsd
-
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