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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
Test 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 3-22
No.
1
2
3
4
5
6
Legend:
– – NS – – – –
– – – – ER – –
– – – – – – ST
SIPROTEC, 7VK61, Manual
C53000-G1176-C159-3, Release date 05.2009
Time status
Status text
– – – – – – – –
– – – – – – ST
– – – – ER – –
– – – – ER ST
– – NS ER – –
– – NS – – – –
Mounting and Commissioning
Status
synchronized
not synchronized
time invalid
time fault
summertime
3.3 Commissioning
213
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