Three-Wire Control, Method 2 - Siemens Sinamics G120 CU240E Operating Instructions Manual

5.2.6

Three-wire control, method 2

Function description
● The first control command is a permanent enable signal for starting the motor. When this
● The motor is started with the positive edge of the second control command.
● The third control command defines the direction of rotation.
Table 5- 10
Enable
signal
Frequency inverter
Operating Instructions, 08.10. 2008, t.b.d.
enable signal is canceled, the motor stops.
Figure 5-6 Three-wire control using digital inputs, method 2
Function table
Motor Reverse
ON motor
0 Not Not relevant No effect
relevant
1 0→1
1 0→1
1 0
1 0
Function when motor is at a
standstill
0 The motor accelerates to the
setpoint.
1 The motor accelerates to the
inverted setpoint.
1→0 No effect
0→1 No effect
Functions
5.2 Inverter control
Function when motor is
rotating
OFF1: The motor decelerates
to a standstill
No effect
No effect
The motor reverses to the
setpoint.
The motor reverses to the
inverted setpoint.
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