Siemens SIPROTEC 4 7SD80 User Manual

Test Mode and Transmission Block
Activation and Deactivation
If the device is connected to a central or main computer system via the SCADA interface, then the information
that is transmitted can be influenced. This is only possible with some of the protocols available (see Table
“Protocol- dependent functions” in the Appendix E.7 Protocol-dependent Functions).
If the test mode is switched on, the messages sent by a SIPROTEC 4 device to the main system has an addi-
tional test bit. This bit allows the messages to be recognized as not resulting from actual faults. Furthermore,
it can be determined by activating the transmission block that no annunciations are transmitted via the
system interface during test mode.
The SIPROTEC 4 System Manual describes in detail how to activate and deactivate the test mode and blocked
data transmission. Please note that when DIGSI is being used for device editing, the program must be in the
online operating mode for the test features to be used.
Checking Time Synchronization
If external time synchronization sources are used, the data of the time source (antenna system, time gener-
ator) are checked (see Technical Data 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 message Alarm Clock OFF . For further information, see SIPROTEC 4
Systemdescription.
Table 3-4 Time status
No. Status text Status
1 – – – – – – – –
synchronized
2 – – – – – – ST
3 – – – – ER – –
not synchronized
4 – – – – ER ST
5 – – NS ER – –
6 – – NS – – – –
Legende:
– – NS – – – –
– – – – ER – –
– – – – – – ST
time invalid
time fault
summertime
If a correct GPS signal is received by a connected GPS receiver, the indication „OFF“ is displayed 3 seconds after
device startup. The pin assignment of the time synchronization interface is indicated in the above Table 3-3.
Testing the System Interface
Prefacing Remarks
If the device features a system interface and this is used to communicate with the control center, 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 “real” operation.
3.3.1
3.3.2
3.3.3
Mounting and Commissioning
3.3 Commissioning
228 SIPROTEC 4, 7SD80, Manual
E50417-G1100-C474-A2, Edition 02.2018

Siemens SIPROTEC 4 7SD80 Specifications

General

Brand	Siemens
Model	SIPROTEC 4 7SD80
Category	Power distribution unit
Language	English