Siemens CU240B-2 - Three-Wire Control, Method 2

Advanced commissioning
6.2 Inverter control
Converter with the CU240B-2 and CU240E-2 Control Units
190 Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
6.2.8
Three-wire control, method 2
With one control command, you enable the two other control commands. You switch the
motor off by withdrawing the enable (OFF1).
You switch on the motor with the positive edge of the second control command (ON).
The third control command defines the motor's direction of rotation (reversing).
Image 6-10 Three-wire control, method 2
Table 6- 11 Function table
Enable / OFF1
ON
Reversing
Function
0 0 or 1 0 or 1 OFF1: The motor stops.
1
0→1
0
ON: Clockwise motor rotation.
1 0→1 1 ON: Counter-clockwise motor rotation.
Parameter
Description
p0015 = 20
Macro drive unit
Controlling the motor using the
digital inputs of the inverter:
DI 0
DI 1
DI 2
Enable / OFF1
ON
Reversing
Advanced setting
Interconnecting control commands with digital inputs of your choice (DI x).
p3330[0 … n] = 722.x
BI: 2/3 wire control command 1 (enable/OFF1)
p3331[0 … n] = 722.x
BI: 2/3 wire control command 2
(ON)
Example: p3331[0] = 722.0 ⇒ if CDS 0 (index[0]) is selected, the inverter
receives its ON command via DI 0.
p3332[0 … n] = 722.x
BI: 2/3 wire control command 3 (reversing)