Test Mode / Transmission Block
If the device is connected to a station control system or a server, the user is able to modify, in some protocols,
information that is transmitted to the substation (see Table “Protocol-dependent Functions” in Appendix E.
7 Protocol-dependent Functions).
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 allows the message to be recognised as resulting from testing and not 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 /1/ SIPROTEC 4 System Manual describes how to activate and deactivate test mode and transmission
block. Note that when DIGSI is being used, the program must be in the Online operating mode for the test
features to be used.
Test Time Synchronisation Interface
If external time synchronisation sources are used, the data of the time source (antenna system, time gener-
ator) are checked (see Section “Technical Data” under “Time Synchronisation Interface”). A correct function
(IRIG B, DCF77) is recognised in such a way that 3 minutes after the startup of the device the clock status is
displayed as
synchronisiert
, accompanied by the message
Störung Uhr GEH
.
Table 3-28 Time Status
No. Status text Status
1 – – – – – – – –
Synchronised
2 – – – – – – SZ
3 – – – – ST – –
Not synchronised
4 – – – – ST SZ
5 – – UG ST – –
6 – – UG – – – –
Legend:
– – UG – – – –
– – – – ST – –
– – – – – – SZ
Invalid time
Clock error
Summer time
Testing the System Interface
Prefacing Remarks
If the device features a system interface and uses it to communicate with the control centre, the DIGSI device
operation can be used to test if messages are transmitted correctly. This test option should however definitely
“not”“ be used while the device is in service on a live system.
3.3.1
3.3.2
3.3.3
Mounting and Commissioning
3.3 Commissioning
SIPROTEC 4, 7UT6x, Manual 355
C53000-G1176-C230-5, Edition 09.2016
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