Siemens SIPROTEC 7UT613 series Manual page 301

Information to a
Control Centre
Classification of In-
dications
7UT613/63x Manual
C53000-G1176-C160-2
In the quiescent state, i.e. as long as no system fault is present, the LCD can display
selectable operational information (overview of the operational measured values) (de-
fault display). In the event of a system fault, information regarding the fault, the so-
called spontaneous displays, are displayed instead. After the fault indications have
been acknowledged, the quiescent data are shown again. Acknowledgement can be
performed by pressing the LED buttons on the front panel (see above).
The device in addition has several event buffers for operational annunciations, switch-
ing statistics, etc., which are saved against loss of auxiliary supply by means of a
backup battery. These messages can be displayed on the LCD at any time by keypad
selection, or transferred to the PC via the serial service interface. Readout of indica-
tions during operation is described in detail in the SIPROTEC 4 System Description.
With a PC and the DIGSI protection data processing software it is also possible to re-
trieve and display the events and visualised on a monitor and menu-guided dialogue.
The data may either be printed, or stored at another location, and then be evaluated.
If the device has a serial system interface, stored information may additionally be
transferred via this interface to a centralized control and storage device. Several com-
munication protocols are available for the transfer of this information.
You may test whether the indications are transmitted correctly with DIGSI.
Also the information transmitted to the control centre can be influenced during opera-
tion or tests. The IEC 60870-5-103 protocol allows to identify all indications and mea-
sured values transferred to the central control system with an added indication „test
mode" while the device is being tested on site (test mode). This identification prevents
the indications from being incorrectly interpreted as resulting from an actual power
system disturbance or event. Alternatively, you may disable the transmission of indi-
cations to the system interface during tests („Transmission Block").
To influence information at the system interface during test mode („test mode" and
„transmission block"), a CFC logic is required. Default settings already include this
logic (see Appendix).
The SIPROTEC 4 System Description describes in detail how to activate and deacti-
vate test mode and blocked data transmission.
The messages are categorized as follows:
• Event Log: These are annunciations that may be generated during operation of the
device: Information regarding the status of device functions, measured data, power
system data, control command logs, etc.
• Trip Log: These are fault messages from the last eight network faults that were pro-
cessed by the device.
• Messages in switching statistics: These messages count the breaker control com-
mands initiated by the device, values of accumulated circuit currents and interrupt-
ed currents.
• Resetting/setting of the above messages.
A complete list of all indication and output functions that can be generated by the
device with the maximum functional scope can be found in the Appendix. All functions
are associated with an information number. There it is also indicated to which destina-
tion the annunciation can be reported. If functions are not present in the specific device
version , or if they are set to disable, then the associated indications cannot appear.
2.22 Additional Functions
301