Siemens SINAMICS G120 CU230P-2, Operating Instructions Manual, Page: 191 / 346

Functions
7.2 Inverter control
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
189
7.2.4 Three-wire control, method 1
With one control command, you enable the two other control commands. You switch the
motor off by canceling 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).
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Figure 7-5 Three-wire control, method 1
Table 7- 8 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 rotation of motor.
1 0 0→1 ON: Counter-clockwise rotation of
motor.
1 1 1 OFF1: The motor stops.
Table 7- 9 Parameter
Parameter Description
Macro drive unit
DI 0 DI 1 DI 2
p0015 = 19
Controlling the motor using
the digital inputs of the
inverter:
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 = 722.0
DI 0: ON Counter-clockwise rotation.
Also see Section Digital inputs (Page 86).