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 D.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 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.
Checking the Time Synchronisation Interface
If external time synchronization sources are used, the data of the time source (antenna system, time gener-
ator) are checked (see Section 4 under „Time Synchronization“). A correct function (IRIG B, DCF77) is recog-
nized in such a way that 3 minutes after the startup of the device the clock status is displayed as
synchron-
ized
, accompanied by the indication
Alarm Clock OFF
. For further information please refer to the
SIPROTEC System Description.
Table 3-22 Time status
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
Test 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, 7VK61, Manual 209
C53000-G1176-C159-5, Edition 05.2018
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