Explanations - Siemens SIPROTEC Manual

Data of the PROFIBUS DP messages
2.1

Explanations

Variables with data
type greater than or
equal to 1 byte
Designation of the
Offset
SIPROTEC objects
10 3P1_V1 =
Bit variables
(SP/SC, DP/DC)
Designation of the
Offset
SIPROTEC objects
0 / 0 Q0 OFF
0 / 1 Q0 ON
Designation of the
Offset
SIPROTEC objects
9 / 5 Cntrl Auth
40
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.
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.
The offset defines the start of the most significant byte in the message, e.g.:
Comments
3P1 Phase to Earth Voltage V1
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
The offset indicates the byte which contains the bit value and the position of bit 0 of
the bit variable, e.g. (input message):
Circuit breaker Q0
Control Authority (0 = Remote, 1 = Local)
The checkback signal from the circuit breaker (as double-point indication) is located in
data byte 0, bit position 2
The single-point indication "Cntrl Auth" is located in byte 9, bit position 2
Comments
Comments
0 1
(bit 0) and 2 (bit 1).
SIPROTEC PROFIBUS DP - Bus mapping 6MD662/3/4
Scaling
(32767 corresponds to...)
3276.7
C53000-L1840-B011-03
Internal
object no.
-
Internal
object no.
-
Internal
object no.
-
5
.