Manual Overwriting - Siemens siprotec 7SA6 User Manual

Control During Operation
7.4.2

Manual Overwriting

From the
Device Front
7-50
When using the Control with Feedback feature, the device checks the feedback
indications (i.e. 52-a and 52-b) before and after a control command is issued. If for
some reason, the physical connection from a circuit breaker auxiliary contact to the
binary inputs of the device is broken, inadvertently shorted, or disconnected,
commands may be blocked. If this situation occurs, and the affected switching device
is to be operated, the desired device position indication can be simulated through
"manual overwriting" (Input Tagging). The entered device position indication in the
7SA6 can be used to simulate and check interlocking conditions.
To accomplish manual overwriting in the 7SA6 the binary inputs of the affected device
must be decoupled first. This decoupling of the system is accomplished by setting the
respective status. The decoupling is discussed in Sub-section 7.4.3.
To enter the desired position indication for a switching device:
With a 7SA6 ready for operation, first press the
key, select the menu item &RQWURO and go to the control functions with
Using the
key. The selection &21752/ appears.
the
key, the %5($.(56:,7&+ sub-menu is entered (see Figure 7-
By pressing the
50).
Select the item 0DQ 2YHUZULWH using the
key. 0$1 29(5:5,7( appears, as shown in Figure 7-50.
using the
The actual position of each switching device is displayed. Move to the desired switch
using the and keys.
%5($.(56:,7&+ 

'LVSOD\
&RQWURO
!0DQ 2YHUZULWH ²! 
6HW VWDWXV
Figure 7-50 Manual Overwriting for Switching Devices from the Front Pane
Enter Password No. 2 (for unlocked switching) and acknowledge with the
By pressing the ENTER key, a selection window is opened for the marked switch, in
which manual overwriting can be done with the options 23(1&/26(. See Figure 7-
51.
Make the selection using the
0$1 2
 !23(1
!%UH &/26
!'LVF
Figure 7-51 Selection Window for Manual Overwriting of a Switch Position, Front Panel
MENU
key, and move to the next selection
³! 
²! 
³! 
and keys, and confirm with the


!23(1
&/26
key. The 0$,1 0(18 appears.
0$1 29(5:5,7( 

%UHDNHU !23(1
'LVF6ZLW &/26
*QG6ZLW 23(1
l
ENTER
key.
ENTER
7SA6 Manual
C53000-G1176-C133-1
key.