phytron
7.1.4 Direction
Input
This signal sets the direction of rotation of the motor.
If the input optocoupler is not energized, the motor drives in the preferential direction. If the
input optocoupler is powered, the selected motor direction of rotation is reversed.
The signal must only be modified when the motor is at a standstill or turns with the
frequency within the start/stop frequency. Don’t change the signal 1 µs before the control
pulse and 4 µs after the control pulse!
Changing the motor direction when the motor is running will cause step losses and/or stop
the motor.
In Rotary switch mode the preferential motor direction can be changed by the rotary switch
STEP (see table in chap. 8).
In ServiceBus mode the preferential motor direction can be programmed (see chap. 9.2.).
7.1.5 Boost
Input
If the input optocoupler is energized the MCD changes to Boost current.
The power stage increases the run and stop current by 30 % in Rotary switch mode. As
long as the Boost input is energized, the run and stop current will always be 30 % higher.
The boost current can be programmed by the user in ServiceBus mode from
0 to 6.3 A
r.m.s.
.
Thus, a higher torque can be reached during the acceleration and deceleration time of the
motor by changing to boost current.
Also see appendix A2.
7.1.6 Activation
Input
If the input optocoupler is energized, the power stage is ready.
This input is useful, for instance, during maintenance operations to switch the power stage
off, without having to disconnect it physically from the mains. It is possible now to slowly
rotate the motor by hand.
WARNING!
The Activation input is not in conformance with the professional emergency
stop circuit requirements.
The input Activation may also be used to avoid the inevitable electrical noise emissions of
the power stage, e.g. if you have to perform sensitive electrical measurements in the
environment of the device.
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MA 2102-A005 GB
