Siemens SITRANS P DS III - Transmission of User Data over PROFIBUS

Configuration/project engineering
9.2 Configuring
SITRANS P DS III with PROFIBUS PA
Operating Instructions, 06/2013, A5E00053276-07
161
Additional function
Byte
User data,
sent to master
User data,
sent from master
Meaning
Operating mode 2 --- Operating mode
Operating mode of totalizer
0 Net counter - count up and
down.
1
Ascending counter
2
Descending counter
3
Hold count.
See also
Analog input function block (Page 104)
Flow measurement (Page 111)
9.2.3
Transmission of user data over PROFIBUS
User data is continually updated via PROFIBUS cyclical data transmission.
Table 9- 3 IEEE standard floating point representation of the measured value
Bits
7
6
5
4
3
2
1
0
Byte
1
VZ E
2
7
E
2
6
E
2
5
E
2
4
E
2
3
E
2
2
E
2
1
Byte
2
E
2
0
E
2
-1
M
2
-2
M
2
-3
M
2
-4
M
2
-5
M
2
-6
M
2
-7
Byte
3
M
2
-8
M
2
-9
M
2
-10
M
2
-11
M
2
-12
M
2
-13
M
2
-14
M
2
-15
Byte
4
M
2
-16
M
2
-17
M
2
-18
M
2
-19
M
2
-20
M
2
-21
M
2
-22
M
2
-23
VZ
Sign
0
positive
1
negative
M
mantissa
E
exponent