Operating instructions

Functions
5.2 Inverter control
CU240S and CU240E Control Units, FW 3.2
Operating Instructions, 03/2009, A5E02440075B AA
91
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
enable signal is canceled, the motor stops.
● The motor is started with the positive edge of the second control command.
● The third control command defines the direction of rotation.
R 
R
R
&RPPDQGLJQRUHG
$FWLYH
$FWLYH
$FWLYH
$FWLYH
$FWLYH
(QDEOH
VLJQDO
0RWRU21
5HYHUVH
PRWRU
0RWRU
VSHHG
W
2))
Figure 5-6 Three-wire control using digital inputs, method 2
Table 5- 11 Function table
Enable
signal
Motor
ON
Reverse
motor
Function when motor is at a
standstill
Function when motor is
rotating
0 Not
relevant
Not relevant No effect OFF1: The motor decelerates
to a standstill
1 0→1 0 The motor accelerates to the
setpoint
No effect
1 0→1 1 The motor accelerates to the
inverted setpoint
No effect
1 0 1→0 No effect The motor reverses to the
setpoint.
1 0 0→1 No effect The motor reverses to the
inverted setpoint.