Siemens SINAMICS G120 CU240E-2 - Inverter Control

Functions
7.2 Inverter control
Inverter with CU240B-2 and CU240E-2 Control Units
Operating Instructions, 07/2010, FW 4.3.2, A5E02299792B AA
157
7.2 Inverter control
If the inverter is controlled using digital inputs, two control command define when the motor
starts, stops and whether clockwise or counter-clockwise rotation is selected (two-wire
control).
Table 7- 1 Controlling the motor
Control commands
0RWRU
URWDWLQJ
&:
0RWRU
URWDWLQJ
&&:
0RWRUVWRSV 0RWRUVWRSV
Explanation
Two-wire control
0RWRURQ
5HYHUVHPRWRU
W
W
1. Control command: Switch motor on
or off (ON/OFF command)
2. Control command: Reverses the
motor direction of rotation
R 
R
0RWRU21
$FWLYH
$FWLYH
$FWLYH
0RWRU
VSHHG
5HYHUVH
PRWRU
2))
W
Figure 7-2 Motor control using digital inputs
Table 7- 2 Function table
Motor ON Reverse
motor
Function
0 0 OFF1: The motor decelerates to a standstill
0 1 OFF1: The motor decelerates to a standstill
1 0 The motor accelerates to the setpoint
1 1 The motor accelerates to the inverted setpoint