Big-endian
Big-endian and little-endian describe the order in which a sequence of bytes is stored. In big-endian systems,
the most significant byte is stored at the lowest storage address. In little-endian systems, the most significant
byte is stored at the highest storage address.
Binary Controlled Analog Process Value
The data type BAC represents a command with or without feedback. The BAC is used for example for the
control of an arc suppression coil. The commands Higher, Lower, and Stop are possible. The feedback from
the process is an analog value.
Binary Controlled Step Position
The data type BSC can, for example, be used to control a transformer tap changer. The commands up, down
can be given.
Bit pattern indication
A bit pattern indication is a processing function, with the help of which adjacent numerical process informa-
tion can be logged coherently and processed further in parallel via multiple inputs. The bit pattern indication
can be selected as 1, 2, 3 or 4 bytes.
BMC
See best master clock algorithm
Boundary Clock
The Precision Time Protocol knows different types of clocks: an ordinary clock (abbreviation: OC), a boundary
clock (BC), and a transparent clock (TC). The boundary clock transports time information over a network limit,
for example, in a router connecting different switched networks: As a slave, the clock of the router receives
the time information and transmits this further on as a master.
BRCB
Buffered Report Control Block
BSC
Binary Controlled Step Position
Buffered Report Control Block
Buffered Report Control Block (BRCB) is a form of report controlling. Internal events trigger the immediate
sending of reports or saving of events for the transfer. Data values cannot therefore be lost on account of
transport flow control conditions or connection interruptions. BRCB provides the functionality SOE (See
Sequence of Events).
CB
Circuit breaker
CDC
Common Data Class
CFC
Continuous Function Chart
Glossary
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SIPROTEC 5, Overcurrent Protection, Manual
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