Siemens SIRIUS 3RW44 - Characteristics; Data Formats and Data Sets

PROFIBUS DP Communication Module
SIRIUS 3RW44 manual
GWA 4NEB 535 2195-02 DS 06
8-35
8.10 Data Formats and Data Sets
8.10.1 Characteristics
The soft starter acquires a multitude of operating, diagnostics and statistics data.
Control data
Data transmitted to the soft starter, e.g. Motor LEFT switching command, Trip
reset, etc.
Data format: Bit
Messages
Data transmitted by the soft starter indicating the current operating status, e.g.
Motor left, etc.
Data format: Bit
Diagnosis
Data transmitted by the soft starter indicating the current operating status, e.g.
Overload fault mode, etc.
Data format: Bit
Current values
Current values are coded in different current formats, in
• 6-bit current format,
• 8-bit current format and
• 9-bit current format:
Figure 8-8: Current formats
Current values are
• Motor current I
max
(6-bit current format)
• Phase currents I
L1max
, I
L2max
, I
L3max
(8-bit current format)
• Last trigger current (9-bit current format)
• Maximum tripping current (9-bit current format)
01245678 3
2
0
2
-1
2
-2
2
-3
2
-4
2
-5
2
3
2
2
2
1
1 + 0.5 + 0.25 + 0.125 + 0.0625 + 0.03125 = 1.96875 (q 0 to 197 %)
8 + 4 + 2 1 + 0.5 + 0.25 + 0.125 + 0.0625 + 0.03125 = 15.97 (q 0 to 1597 %)
Bit
6-bit current format
4 + 2 1 + 0.5 + 0.25 + 0.125 + 0.0625 + 0.03125 = 7.97 (q 0 to 797 %)
8-bit current format
9-bit current format