Siemens CU240B-2 - Three-Wire Control, Method 1

Advanced commissioning
6.2 Inverter control
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
189
6.2.7
Three-wire control, method 1
With one control command, you enable the two other control commands. You switch the
motor off by withdrawing the enable (OFF1).
You switch the motor's direction of rotation to clockwise rotation with the positive edge of the
second control command. If the motor is still switched off, switch it on (ON).
You switch the motor's direction of rotation to counter-clockwise rotation with the positive
edge of the third control command. If the motor is still switched off, switch it on (ON).
Image 6-9 Three-wire control, method 1
Table 6- 10 Function table
Enable / OFF1
ON clockwise
rotation
ON counter-
clockwise rotation
Function
0 0 or 1 0 or 1 OFF1: The motor stops.
1
0→1
0
ON: Clockwise motor rotation.
1 0 0→1 ON: Counter-clockwise motor rota-
tion.
1
1
1
OFF1: The motor stops.
Parameter
Description
p0015 = 19
Macro drive unit
Controlling the motor
using the digital inputs of
the inverter:
DI 0
DI 1
DI 2
Enable /
OFF1
ON clockwise
rotation
ON counter-
clockwise rotation
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 clockwise rotation)
p3332[0 … n] = 722.x
BI: 2/3 wire control command 3
(ON counter-clockwise rotation)
Example: p3332[0] = 722.0 ⇒ if CDS 0 (index[0]) is selected, the inverter
receives its ON counter-clockwise command via DI 0.