Siemens SIPROTEC4 6MD63, Руководство по протоколу

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7SJ61...7SJ63, 7SJ65, 6MD63 PROFIBUS-DP – Bus mapping
C53000-L1840-B006-02 1-1
1 Data in the PROFIBUS-DP messages
Data in the PROFIBUS-DP
messages
1
1.1 Explanation
Note
The examples shown in this chapter 1.1 do not necessarily correspond
to the real allocation of the objects in the bus mapping.
The chapters 2 to 5 define the data area of the PROFIBUS-DP
messages for data transfer between the PROFIBUS-DP slave of the
SIPROTEC device 7SJ61...7SJ63, 7SJ65, 6MD63 with the PROFIBUS-
DP master.
The listed SIPROTEC objects in the PROFIBUS-DP message 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.:
Offset Designation of the
SIPROTEC objects
Comments Scaling
(32767 corresponds to ...)
Internal
object no.
2 Ia Current in phase A 3276.7 A 601
The measured value “Ia“ is assigned to data byte 2 (most significant byte
of the measured value) and data byte 3 (least significant byte of the
measured value) in the PROFIBUS-DP message.