Mounting and Commissioning
3.3 Commissioning
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
532
3.3.1
Test Mode / Transmission Block
Activation and Deactivation
If the device is connected to a central control system or a server via the SCADA interface, then the information
that is transmitted can be modified with some of the protocols available (see Table „Protocol-dependent func-
tions“ in the Appendix A.5).
If
Test mode
is set ON, then a message sent by a SIPROTEC 4 device to the main system has an additional
test bit. This bit allows the message to be recognized as resulting from testing and not an actual fault or power
system event. Furthermore it can be determined by activating the
Transmission block
that no indications at
all are transmitted via the system interface during test mode.
The SIPROTEC 4 System Description describes how to activate and deactivate test mode and blocked data
transmission. Note that when DIGSI is being used, the program must be in the
Online
operating mode for the
test features to be used.
3.3.2
Checking Time Synchronisation Interface
If external time synchronization sources are used, the data of the time source (antenna system, time generator)
are checked (see Section 4 under „Time Synchronization“). A correct function (IRIG B, DCF77) is recognized
in such a way that 3 minutes after the startup of the device the clock status is displayed as
„synchronized“
,
accompanied by the indication
„Alarm Clock OFF“
. For further information please refer to the SIPROTEC
System Description.
Table 3-21
Time status
If a GPS receiver is connected and a proper GPS signal is available, the message
„>GPS failure“
„OFF“
appears approx. 3 seconds after startup of the device.
No.
Status text
Status
1
– – – – – – – –
synchronized
2
– – – – – – ST
3
– – – – ER – –
not synchronized
4
– – – – ER ST
5
– – NS ER – –
6
– – NS – – – –
Legend:
– – NS – – – –
– – – – ER – –
– – – – – – ST
time invalid
time fault
summertime
