Siemens SINAMICS G150, Operating Instructions Manual

Page: 449 / 680

Setpoint channel and closed-loop control
7.4 Vector speed/torque control with/without encoder
Converter cabinet units
Operating Instructions, 07/2016, A5E03347396A
449
Function diagram
FP 6040 Speed controller with/without encoder
Parameters
•
r0062
CO: Speed setpoint after the filter
•
r0063
CO: Actual speed value smoothed
•
p0340
Automatic calculation of motor/control parameters
•
r0345
Rated motor startup time
•
p1442
Speed controller actual speed value smoothing time
•
p1452
Speed controller actual speed value smoothing time (without encoder)
•
p1460
Speed controller P gain adaptation speed lower
•
p1462
Speed controller integral time adaptation speed lower
•
p1470
Speed controller encoderless operation P gain
•
p1472
Speed controller encoderless operation integral time
•
p1475
CI: Speed controller torque setting value for motor holding brake
•
p1478
CI: Speed controller integrator setting value
•
r1482
CO: Speed controller I torque output
•
r1508
CO: Torque setpoint before supplementary torque
•
p1960
Rotating measurement selection
Examples of speed controller settings
A few examples of speed controller settings with vector control without encoders (p1300 =
20) are provided below. These should not be considered to be generally valid and must be
checked in terms of the control response required.
● Fans (large centrifugal masses) and pumps
Kp (p1470) = 2 … 10
Tn (p1472) = 250 … 500 ms
The Kp = 2 and Tn = 500 ms settings result in asymptotic approximation of the actual
speed to the setpoint speed after a setpoint step change. During many simple control
procedures, this is satisfactory for pumps and fans.
● Stone mills, separators (large centrifugal masses)
Kp (p1470) = 12 … 20
Tn (p1472) = 500 … 1000 ms