Siemens SINAMICS G120 Operating Instructions Manual page 184

Functions
5.11 Operation in fieldbus systems
Bit Value Significance
11
0 No setpoint inversion
1 Setpoint inversion
12 Not used
13 1 Motorized potentiometer UP
14 1 Motorized potentiometer LOWER
15 1 Data set changeover
Default assignment of control word 2 (STW2)
The settings for control word 2 are defaulted as follows. This can be changed by using BICO.
Table 5- 85 Default setting for control word 2 (not defined for VIK/NAMUR)
Bit Value
0 1
1 1
2 1
3 1
4 –
5 –
6 –
7 –
8 1
9 1
10 –
11 1
12 1
0
13 0
14 –
15 –
184
Significance
Fixed frequency selection bit 0
Fixed frequency selection bit 1
Fixed frequency selection bit 2
Fixed frequency selection bit 3
Not used
Not used
Not used
Not used
Enable technology controller
Enable DC brake
Not used
Enable droop speed controller
Torque control
Speed control
External fault 1
Not used
Not used
Comments
Motor runs clockwise in response to a positive setpoint.
Motor runs counter-clockwise in response to a positive
setpoint.
Dependent on protocol:
with SINAMICS G120 inverters, 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.
CU240S and CU240E Control Units, FW 3.2
Operating Instructions, 03/2009, A5E02440075B AA