Advanced commissioning
6.13 Setpoint calculation
Converter with the control units CU240D-2
Operating Instructions, 04/2018, FW V4.9 SP10, A5E34262100B AF
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Table 6- 21 Settings for the application example
Parameter
Description
p1001 = 300.000
Fixed speed setpoint 1 [rpm]
p1002 = 2000.000
Fixed speed setpoint 2 [rpm]
p0840 = 722.0
ON/OFF1: Switches on the motor with digital input 0
p1070 = 1024
Main setpoint: Interconnects the main setpoint with fixed speed setpoint.
p1020 = 722.0
Fixed speed setpoint selection bit 0: Interconnects fixed speed setpoint 1
with digital input 0 (DI 0).
p1021 = 722.1
Fixed speed setpoint selection bit 1: Interconnects fixed speed setpoint 2
with digital input 1 (DI 1).
p1016 = 1
Fixed speed setpoint mode: Directly selects fixed speed setpoints.
Table 6- 22 Resulting fixed speed setpoints for the application example
Fixed speed setpoint selected via
Resulting setpoint
DI 0 = 0
Motor stops
DI 0 = 1 and DI 1 = 0
300 rpm
DI 0 = 1 and DI 1 = 1
2300 rpm
6.13
Setpoint calculation
6.13.1
Overview
Overview
Setpoint processing influences the setpoint using the following functions:
●
"Invert" inverts the motor direction of rotation.
●
The "Inhibit direction of rotation" function prevents the motor from rotating in the incorrect
direction; this function can make sense for conveyor belts, extruders, pumps and fans, for
example.
●
The "Skip frequency bands" prevent the motor from being continuously operated within
these skip bands. This function avoids mechanical resonance effects by only permitting
the motor to operate briefly at specific speeds.
