Operating instructions

Functions
5.11 Operation in fieldbus systems
CU240S and CU240E Control Units, FW 3.2
184 Operating Instructions, 03/2009, A5E02440075B AA
Bit Value Significance 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 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.
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 Significance
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