Functions
7.2 Inverter control
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
188
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
7.2.3
Two-wire control, method 3
You switch the motor on and off using a control command (ON/OFF1) and at the same time
select clockwise motor rotation. You also use the other control command to switch the motor
on and off, but in this case you select counter-clockwise rotation for the motor.
Unlike method 2, the inverter will accept the control commands at any time, regardless of the
motor speed.
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Figure 7-4
Two-wire control, method 3
Table 7- 6
Function table
ON/OFF1 clockwise
rotation
ON/OFF1 , counter-
clockwise rotation
Function
0
0
OFF1: The motor stops.
1
0
ON: Clockwise rotation of motor.
0
1
ON: Counter-clockwise rotation of motor.
1
1
OFF1: The motor stops.
Table 7- 7
Parameter
Parameter
Description
Macro drive unit
DI 0
DI 1
p0015 = 18
Controlling the motor using the digital
inputs of the inverter:
ON/OFF1
clockwise
rotation
ON/OFF1 ,
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 (ON/OFF1 clockwise rotation)
p3331[0 … n] = 722.x BI: 2-3-WIRE Control Command 2 (ON/OFF1 , counter-clockwise rotation)
Example
p3331[0 … n] = 722.2 DI 2: ON/OFF1 Counter-clockwise rotation
Also see Section Digital inputs (Page 86).
Summary of Contents for SINAMICS G120 CU230P-2
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