9.1.4 Operation principle
Status indication and validity check
The object state is defined by two digital inputs, POSOPEN and POSCLOSE, which are
also available as outputs OPENPOS and CLOSEPOS together with the OKPOS
information. The debouncing and short disturbances in an input are eliminated by
filtering. The binary input filtering time can be adjusted separately for each digital input
used by the function block. The validity of the digital inputs that indicate the object state
is used as additional information in indications and event logging. The reporting of faulty
or intermediate position of the apparatus occurs after the Event delay setting, assuming
that the circuit breaker is still in a corresponding state.
Table 862: Status indication
Input Status Output
POSOPEN POSCLOSE POSITION
(Monitored data)
OKPOS OPENPOS CLOSEPOS
1=True 0=False 1=Open 1=True 1=True 0=False
0=False 1=True 2=Closed 1=True 0=False 1=True
1=True 1=True 3=Faulty/Bad
(11)
0=False 0=False 0=False
0=False 0=False 0=Intermediat
e (00)
0=False 0=False 0=False
Enabling and blocking
52, 29DS and 29GS have an enabling and blocking functionality for interlocking and
synchrocheck purposes.
Circuit breaker control 52
Normally, the CB closing is enabled (that is, CLOSE_ENAD signal is TRUE) by activating
both ENA_CLOSE and SYNC_OK inputs. Typically, the ENA_CLOSE comes from the
interlocking, and SYNC_OK comes from the synchronism and energizing check. The
input SYNC_ITL_BYP can be used for bypassing this control. The SYNC_ITL_BYP
input can be used to activate CLOSE_ENAD discarding the ENA_CLOSE and SYNC_OK
input states. However, the BLK_CLOSE input always blocks the CLOSE_ENAD output.
The CB opening (OPEN_ENAD) logic is the same as CB closing logic, except that
SYNC_OK is used only in closing. The SYNC_ITL_BYP input is used in both
CLOSE_ENAD and OPEN_ENAD logics.
1MAC059074-MB A Section 9
Control functions
615 series ANSI 959
Technical Manual
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