Siemens siprotec 7SA6 User Manual page 516

Control During Operation
Changing the Time
Setting Date and
Time
From the
Device Front
7-32
Item 4 displays the normal condition; that is, the time is synchronized cyclically
according to the type of operation.
Item 5 is displayed if the transmitted time value from the synchronization via the
system interface is marked as "invalid".
The time can be changed
− By setting the time manually, using the integrated control panel or DIGSI
− By adjusting the settings for time control.
The date and time can be manually set during operation, provided that the device
allows this and password N° 5 (individual settings) was entered. A precondition is that
the appropriate type of operation for time control must be selected (see Section 5.7).
When the source of time synchronisation is "internal" or "pulse via binary input" the
date and time can be manually set during operation at any instant. The annunciations
"time error ON" and "time error OFF" appear in the annunciation log to indicate time
synchronization and loss of time synchronization, respectively.
In the other operating modes, manual adjustments are only accepted if the
synchronization is momentarily lost. The messages "time error ON" and "time error
OFF" are given when manually changing the year in the IRIG B mode.
Without healthy or external time synchronisation the free running date and time can
also be relatively adjusted (+/– 23:59:59) using the entry field 'LII²WLPH.
This input possibility is not to be confused with the parameter 2IIVHW (see Section
5.7), which affects the specific general offset to the received synchronization time of
the radio clock receiver (e.g. local time vs. GMT time).
Please take note that in a Distance Protection system with 7SA6 the internal clock
continues working without supply voltage for a maximum time period of 24 hours.
Once this time period has expired, date and time must be set again.
With a device ready for operation, first press the
Select 6HWWLQJV, and in the sub-menu 6(783(;75$6. To set the date and time
manually, choose the selection 'DWH7LPH and move to the '$7(7,0( display us-
ing the key. See Figure 7-29.
6(783(;75$6

!'DWH7LPH
!&ORFN 6HWXS
Figure 7-29 Manual date and time adjustment from the front panel
To change one of the previous settings (date, time, differential time), mark the item us-
ing the and keys, and then press the
Enter password N° 5 (for changing settings). Then the actual setting appears in a
frame with a blinking cursor. Overwrite this setting with the desired new one using the
number keys. Be careful to enter the format properly.
MENU

²! 
'$7(7,0(
²! 
6WDWXV
!   
'LII²WLPH 
key.
ENTER
®
key. The 0$,1 0(18 appears.
  
7SA6 Manual
C53000-G1176-C133-1
4;