Siemens 6MD662, Manual

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Data of the PROFIBUS DP messages
40
SIPROTEC PROFIBUS DP - Bus mapping 6MD662/3/4
C53000-L1840-B011-03
2.1 Explanations
Chapter 3 to 5 define the data area of the PROFIBUS DP messages for data transfer
between the PROFIBUS DP slave of the SIPROTEC device 6MD662/3/4 and the
PROFIBUS DP master.
The columns "Designation of the SIPROTEC objects" contain the texts of the SIPRO-
TEC objects for
"US English"
device language.
The listed SIPROTEC objects in the PROFIBUS DP messages’ data area are sorted
after byte offset, beginning with 0.
Variables with data
type greater than or
equal to 1 byte The offset defines the start of the most significant byte in the message, e.g.:
The measured value
“3P1_V1”
is assigned to data byte 10 (most significant byte of
the measured value) and data byte 11 (least significant byte of the measured value)
in the PROFIBUS DP message
Bit variables
(SP/SC, DP/DC) The offset indicates the byte which contains the bit value and the position of bit 0 of
the bit variable, e.g. (input message):
The checkback signal from the circuit breaker (as double-point indication) is located in
data byte 0, bit position 2
0
(bit 0) and 2
1
(bit 1).
The single-point indication “
Cntrl Auth
” is located in byte 9, bit position 2
5
.
Note:
The examples shown in this chapter 2.1 do not necessarily correspond to the real allo-
cation of the objects in the bus mapping.
Offset
Designation of the
SIPROTEC objects
Comments
Scaling
(32767 corresponds to...)
Internal
object no.
10 3P1_V1 = 3P1 Phase to Earth Voltage V1 3276.7 -
Offset
Designation of the
SIPROTEC objects
Comments
Internal
object no.
0 / 0 Q0 OFF
Circuit breaker Q0 -
0 / 1 Q0 ON
Offset
Designation of the
SIPROTEC objects
Comments
Internal
object no.
9 / 5 Cntrl Auth Control Authority (0 = Remote, 1 = Local) -