Manual Overwriting - Siemens siprotec 7SA522 User Manual

Control During Operation
7.4.2

Manual Overwriting

From the
Device Front
7-40
When using the Control with Feedback feature, the device checks the feedback in-
dications (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 7SA522 can be used to
simulate and check interlocking conditions.
To accomplish manual overwriting in the 7SA522 the binary inputs of the affected de-
vice must be decoupled first. $% (Access Block = Block Input Acquisition) This decou-
pling of the system is accomplished by setting the respective status. The decoupling
is discussed in Sub-section 7.4.3.
To enter the desired position indication for a switching device:
With a 7SA522 ready for operation, first press the
key, select the menu item &RQWURO and go to the control functions with
Using the
key. The selection &21752/ appears.
the
key, the %5($.(56:,7&+ sub-menu is entered (see Figure 7-
By pressing the
46).
Select the item 0DQ 2YHUZULWH using the
key. 0$1 29(5:5,7( appears, as shown in Figure 7-46.
using the
The actual position of each switching device is displayed. Move to the desired switch
using the and keys.
%5($.(56:,7&+ 

'LVSOD\
&RQWURO
!0DQ 2YHUZULWH ²! 
6HW VWDWXV
Figure 7-46 Manual Overwriting for Switching Devices from the Front Pane
By pressing the key, a selection window is opened for the marked switch, in
ENTER
which manual overwriting can be done with the options 23(1&/26(. See Figure 7-
47.
Make the selection using the
Enter Password No. 2 (for non-interlocked switching) and acknowledge with the
key.
MENU
key, and move to the next selection
³! 
²! 
0$1 29(5:5,7( 

³! 
%UHDNHU
'LVF6ZLW
*QG6ZLW
and keys, and confirm with the
key. The 0$,1 0(18 appears.
!23(1
&/26
23(1
l
key.
ENTER
7SA522 Manual
C53000-G1176-C119-2
ENTER