Co: Speed Controller Speed Setpoint / N_Ctrl N_Set; Speed Setpoint I Component / N_Set I_Comp; Ci: Speed Controller Speed Actual Value / N_Ctrl N_Act - Siemens SINAMICS G150 Manual

2 Parameters
2.2 List of parameters
r1438

CO: Speed controller speed setpoint / n_ctrl n_set

VECTOR_G (n/M) Can be changed: -
Data type: FloatingPoint32
P-Group: Closed-loop control
Not for motor type: REL
Min
- [rpm]
Description: Display and connector output of the speed setpoint after setpoint limiting for the P component of the speed controller.
For U/f operation, the value that is displayed is of no relevance.
Dependency: Refer to: r1439
Note: In the standard state (the reference model is de-activated), r1438 = r1439.
r1439

Speed setpoint I component / n_set I_comp

VECTOR_G (n/M) Can be changed: -
Data type: FloatingPoint32
P-Group: Closed-loop control
Not for motor type: REL
Min
- [rpm]
Description: Displays the speed setpoint for the I component of the speed controller (output of the reference model after the
setpoint limiting).
Dependency: Refer to: r1438
Note: In the standard state (the reference model is de-activated), r1438 = r1439.
p1440[0...n]

CI: Speed controller speed actual value / n_ctrl n_act

VECTOR_G (n/M) Can be changed: T
Data type: Unsigned32 / FloatingPoint32
P-Group: Closed-loop control
Not for motor type: REL
Min
-
Description: Sets the signal source for the speed actual value of the speed controller.
Dependency: Refer to: r1443
Danger: When using external speed actual values for the speed controller, for a direction of rotation change via p1821 = 1,
then its polarity must also be changed (e.g. for an encoder DO via p0410). Otherwise, a positive coupling can occur
in the speed control loop and the drive would then be accelerated up to the speed limit.
Caution: Speed control with encoder (p1300 = 21):
For the speed or position signal of the motor model there must always be a motor encoder available (evaluation via
SMC/SMI, see p0400). The actual speed of the motor (r0061) and the position data for synchronous motors continue
to come from this motor encoder and are not affected by the setting of p1440.
Interconnection of p1440:
If connector input p1440 is interconnected with an external speed actual value, the identical scaling of the speed
should be observed (p2000).
Notice: Speed control without encoder (p1300 = 20):
Dependent upon the transmission path of the external speed signal there will be dead times which have to be taken
into account when setting the speed controller parameters (p1470, p1472) and can lead to dynamic losses
accordingly. It is for this reason that signal transmission times have to be kept as low as possible.
So that the speed controller can also work at standstill, set p1750.2 = 1 (closed-loop operation from zero speed for
passive loads). If you do not make this setting, operation will switch to open-loop speed control in the low speed
range, switching the closed-loop speed controller off and rendering the measured actual speed ineffective.
Note: Speed control with encoder (p1300 = 21):
An external speed signal should, on the average, correspond to the speed of the motor encoder (r0061).
366
Calculated: -
Dyn. index: -
Units group: 3_1
Scaling: p2000
Max
- [rpm]
Calculated: -
Dyn. index: -
Units group: 3_1
Scaling: p2000
Max
- [rpm]
Calculated: -
Dyn. index: CDS, p0170
Units group: -
Scaling: p2000
Max
-
List Manual (LH2), 04/2014, A5E03263479A
Access level: 3
Func. diagram: 3001, 5019,
5030, 5042, 5210, 6020, 6031
Unit selection: p0505
Expert list: 1
Factory setting
- [rpm]
Access level: 3
Func. diagram: 5030, 5040,
6031
Unit selection: p0505
Expert list: 1
Factory setting
- [rpm]
Access level: 3
Func. diagram: 6040
Unit selection: -
Expert list: 1
Factory setting
63[0]
SINAMICS G130/G150