Table of Contents
Advertisement
2.14.1.2 Information via Display Panel or PC
Events and conditions can be read at the display panel of the Web Monitor. A PC to which the information is
then sent can be connected via the USB interface or port F of the device.
The device is equipped with several event buffers for operational indications, circuit breaker statistics etc.,
which are protected against loss of the auxiliary voltage by a buffer battery. Reading indications indications
during operation is described in the Web Monitor section and in the SIPROTEC 4 System Description.
Classification of Messages
The messages are categorized as follows:
• Operational messages (event log); messages generated while the device is operating: Information regarding
the status of device functions, measured data, power system data, control command logs etc.
• Fault messages (trip log): messages from the last 8 network faults that were processed by the device.
• Messages of "statistics"; they include a counter for the trip commands initiated by the device and possibly
reclose commands as well as values of interrupted currents and accumulated fault currents.
A complete list of all message 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 (FNo).
There is also an indication of where each message can be sent to. If functions are not present in a not fully
equipped version of the device, or are configured to Disabled, then the associated indications cannot appear.
Operational Messages (Buffer: Event Log)
The operational messages contain information that the device generates during operation and about operation-
al conditions. Up to 200 operational messages are recorded in chronological order in the device. New messag-
es are appended at the end of the list. If the memory is used up, then the oldest message is scrolled out of the
list by a new message.
Fault Messages (Buffer: Trip Log)
After a fault on the system, for example, important information about the progression of the fault can be re-
trieved, such as the pickup of a protective element or the initiation of a trip signal. The start of the fault is time
stamped with the absolute time of the internal system clock. The progress of the disturbance is output with a
relative time referred to the instant of fault detection, so that the duration of the fault until tripping and up to reset
of the trip command can be ascertained. The resolution of the time information is 1 ms
Retrievable Messages
The messages for the last eight network faults can be retrieved and read out. The definition of a network fault
is such that the time period from fault detection up to final clearing of the disturbance is considered to be one
network fault. If auto-reclosing occurs, then the network fault ends after the last reclosing shot, which means
after a successful reclosing or lockout. Therefore the entire clearing process, including all reclosing shots, oc-
cupies only one trip log buffer. Within a network fault, several fault messages can occur (from the first pickup
of a protective function to the last dropout of a protective function). Without auto-reclosing each fault event rep-
resents a network fault.
In total 600 indications can be recorded. Oldest data are erased for newest data when the buffer is full.
General Interrogation
The general interrogation which can be retrieved via DIGSI enables the current status of the SIPROTEC 4
device to be read out. All messages requiring general interrogation are displayed with their present value.
SIPROTEC, 7SC80, Manual
E50417-G1140-C486-A1, Release date 12.2011
Functions
2.14 Additional Functions
159
Advertisement
Table of Contents
