Advanced commissioning
7.9 Setpoint calculation
SIMATIC ET 200pro FC-2 converter
138
Operating Instructions, 04/2018, FW V4.7 SP10, A5E34257324B AF
Parameter
Description
...
...
p1015
Fixed speed setpoint 15 (factory setting: 0 rpm)
p1016
Speed fixed setpoint mode (factory setting: 1)
1:
Direct
2:
Binary
p1020
Speed fixed setpoint selection bit 0 (factory setting: 0)
p1021
Speed fixed setpoint selection bit 1 (factory setting: 0)
p1022
Speed fixed setpoint selection bit 2 (factory setting: 0)
p1023
Speed fixed setpoint selection bit 3 (factory setting: 0)
r1024
Fixed speed setpoint effective
r1025.0
Fixed speed setpoint status
1 signal
Fixed speed setpoint is selected
7.9
Setpoint calculation
7.9.1
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.
●
The "Speed limitation" function protects the motor and the driven load against excessively
high speeds.
●
The "Ramp-function generator" function prevents the setpoint from suddenly changing.
As a consequence, the motor accelerates and brakes with a reduced torque.
Figure 7-21 Setpoint processing in the inverter
