Functions
5.11 Operation in fieldbus systems
Frequency inverter
Operating Instructions, 08.10. 2008, t.b.d.
185
Bit
Value
Meaning
Comments
0
No setpoint inversion
Motor runs clockwise in response to a positive setpoint.
11
1
Setpoint inversion
Motor runs counter-clockwise in response to a positive
setpoint.
12
Not used
13
1
Motorized potentiometer UP
14
1
Motorized potentiometer LOWER
15
1
Data set changeover
Dependent on protocol:
with SINAMICS G120 converters, you can switch between
the command data sets (CDS) 0 and 1 in control word 1, bit
15 using the local/remote operation function. This triggers a
data set changeover. Command data set 0 is active for
local operation, while command data set 1 is active for
remote operation. You can now set the application-specific
parameters for command and target value sources in both
command data sets.
Default assignment of control word 2 (STW2)
The settings for control word 2 are defaulted as follows. These can be changed by means of
BICO.
Table 5- 66 Default setting for control word 2 (not defined for VIK/NAMUR)
Bit
Value
Meaning
0
1
Fixed frequency selection bit 0
1
1
Fixed frequency selection bit 1
2
1
Fixed frequency selection bit 2
3
1
Fixed frequency selection bit 3
4
–
Not used
5
–
Not used
6
–
Not used
7
–
Not used
8
1
Enable technology controller
9
1
Enable DC brake
10
–
Not used
11
1
Enable droop speed controller
1
Torque control
12
0
Speed control
13
0
External fault 1
14
–
Not used
15
–
Not used