Siemens SIPROTEC 7VU681, User Manual

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Mounting And Commissioning
3.3 Commissioning
SIPROTEC, 7VU681, User Manual
C53000-G1176-C368-1, Release Date 07.2012 85
3.3.1 Test Mode/Transmission Block
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
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 /1/ 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 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.
DNAGER!
Danger evolving from operating the equipment (e.g. circuit breakers, disconnectors) by means of the
test function
Non-observance of the following measure will result in death, severe personal injury or substantial property
damage.
Equipment used to allow switching such as circuit breakers or disconnectors is to be checked only during com-
missioning. Do not under any circumstances check them by means of the testing mode during "real" operation
performing transmission and reception of messages via the system interface.
Note
After termination of the hardware test, the device will reboot. Thereby, all annunciation buffers are erased. If
required, these buffers should be extracted with DIGSI prior to the test.
The interface test is carried out using DIGSI in the Online operating mode:
• Open the Online directory by double-clicking; the operating functions for the device appear.
• Click on Test; the function selection appears in the right half of the screen
• Double-click on Testing Messages for System Interface shown in the list view. The dialog box Generate
Annunciations opens (refer to the following figure).
Structure of the Test Dialogue Box
In the column Indication the display texts of all indications are displayed which were allocated to the system
interface in the matrix. In the column Status SCHEDULED , you have to define the value for the messages to
be tested. Depending on the indication type, several input fields are offered (e.g. "ON"/ "OFF"). By double-
clicking onto one of the fields the required value can be selected from the list.