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System Manual – MOVITRAC® 07
Application examples
Project Planning
Inverter control
You can determine the direction of rotation using direction of rotation terminals
"CW/STOP" and "CCW/STOP".
After the enable, the inverter increases the speed using speed ramp P130 until minimum
speed P301 is reached. PI control takes effect once the minimum speed has been
reached. The PI-controller correcting variable directly determines the speed setpoint.
If you revoke the CW/CCW terminal, the inverter deactivates PI control and stores the I
component of the PI-controller. Speed is reduced with the speed ramp (P131). The PI-
controller is reactivated with the current setpoint if an enable is issued before the drive
has reached its stop speed.
If you stop the inverter with the "Enable/Stop" terminal, the drive decelerates with the
rapid stop ramp. The inverter stores the I component of the controller.
With setpoint source RS485 or SBus, the inverter specifies the direction of rotation as
follows: The terminal determines the setpoint direction of rotation if one of the two termi-
nals CW or CCW is active. The value of the PO data item "PI CTRL %" acts as a setpoint
for the PI-controller. If both terminals are active, the +/- sign of the PO data item "PI
CTRL %" determines the setpoint direction of rotation. The value of the PO data item "PI
CTRL %" acts as a setpoint for the PI-controller.
5.18
Application examples
All the following application examples assume that the unit has been started up correctly
in accordance with Sec. "Startup".
External setpoint
potentiometer
The external setpoint potentiometer is not in effect when manual mode is activated.
Parameter 121
Addition Setpoint Potentiom.
on the operating panel must be set to ON.
Connect an external setpoint potentiometer as follows:
With dropping
resistor
The resistance value of the external setpoint potentiometer R1 must be 10 k
Ω
. The drop-
ping resistor R2 must have a resistance value of 12 k
Ω
.
03416CXX
Figure 60: External setpoint potentiometer with DI01 = CW/STOP /
DI02 = CCW/STOP / DI03 = Enable / DO02 = Brake
