1 Introduction
6
7UM62 Manual
C53000-G1176-C149-3
Messages and
Measured Values;
Storage of Data for
Fault Recordings
A series of operating messages provides information about conditions in the power
system and the 7UM62 itself. Measurement quantities and values that are calculated
can be displayed locally and communicated via the serial interfaces.
Messages of the 7UM62 can be indicated by a number of programmable LEDs on the
front panel, externally processed through programmable output contacts, and
communicated via the serial interfaces (see “Communication” below). With the help of
the CFC graphic tool (Continous Function Chart), user-defined annunciations and
logical combinations of internal or external signals can also be generated.
During a network fault (fault in the power system), important events and state changes
are stored in a fault annunciation buffer. The instantaneous measured values during
the fault are also stored in the device and are subsequently available for fault analysis.
Communication
Serial interfaces are available for communications with external operating, control,
and storage systems.
Operator Interface
on Front Panel
A serial operator interface on the front panel is provided for local communications with
the through a personal computer. All of the operating and evaluation processes can
be done via this operator interface using the DIGSI
®
4 software. These processes
include selecting and modifying the settings, allocation of the binary inputs and
outputs, configuration of the user-definable logic functions, reading the event and fault
data, retrieving the measured values, obtaining the oscillographic fault records,
reading the states of the 7UM62 and the measurement quantities, and issuing control
commands.
Interfaces on Back
Further interfaces are located on the back of the 7UM62 — dependent on the version
of the device. Comprehensive communications are possible between these interfaces
and other digital equipment used for operating, control, and data storage.
The service interface can be operated through data lines. Also, a modem can be
connected to this port. Servicing of the substation or plant is possible from a remote
computer with DIGSI
®
4.
The system interface is for central communications between the 7UM62 and a control
station. The service interface can be operated through data lines or optical fibres.
Several standard protocols are available:
−
IEC 60870–5–103
Integration of the devices into the automation systems SINAUT
®
LSA and SICAM
®
also take place with this profile.
−
Profibus DP
This protocol of automation technology allows to transmit annunciations and
measured values.
−
Modbus ASCII/RTU
This protocol of automation technology allows to transmit annunciations and
measured values.
−
DNP 3.0
This protocol of automation technology allows to transmit annunciations and
measured values.
−
It is also possible to provide an analog output (2 x 20 mA) for the output of measured
values.
