P221 Speed Controller: Hysteresis For Speed-Dependent Pi/P Controller Switchover; Setting Values For Speed Controller; Speed Controller Droop; P228 Filter Time For Speed Setpoint - Siemens 6RA70 Series Instructions Manual

PNU Description
r218 Indication of the active integration time of the speed controller
(G151)
(G152)
r219 Display of effective P gain of speed controller
(G151)
(G152)
P221 Speed controller: Hysteresis for speed-dependent PI/P controller
switchover
FDS
See P222 for further details.
(G152)
P222 Speed controller: Speed-dependent switchover threshold for PI / P
controller
FDS
0.00 Automatic switchover from PI to P controller deactivated.
(G152)
> 0.00 Depending on the actual speed (K0166), the PI controller
switches over to a P controller if the speed drops below the
threshold set in parameter P222. The integrator is not switched
in again (with value of 0) until the actual speed is > P222 +
P221.
This function allows the drive to be stopped without overshoot
using a zero setpoint with the controllers enabled.
This function is active only if the binector selected in P698 is in
the log. "1" state.

Setting values for speed controller

P223 Control word for speed controller precontrol
*
0 Speed controller precontrol disabled
FDS
1 Speed controller precontrol acts as torque setpoint (is added to
(G152)
n controller output)
P224 Control word for speed controller I component
*
0 Set controller I component to 0 (i.e. to achieve a pure P
FDS
controller)
(G152)
1 Controller I component is active
The I component is stopped when a torque or current limit is
reached
2 Controller I component is active
The I component is stopped when a torque limit is reached
3 Controller I component is active
The I component is stopped only when ±199.99% is reached
P225 Speed controller P gain
See also setting values for "Speed controller adaptation" function (P550 to
FDS
P559).
This parameter is set automatically during the speed controller optimization
(G151)
run (P051=26).
P226 Speed controller reset time
FDS
This parameter is set automatically during the speed controller optimization
(G151)
run (P051=26).

Speed controller droop

Function: A parameterizable feedback loop can be connected in parallel to the I and P components of the speed controller (acts on
summation point of setpoint and actual value).
P227 Speed controller droop
A 10% speed droop setting causes a 10% deviation in the speed from the
FDS
setpoint at a 100% controller output (100% torque or armature current
setpoint) ("softening" of closed-loop control).
(G151)
See also P562, P563, P630 and P684
P228 Filter time for speed setpoint
Filtering of setpoint by means of a PT1 element.
FDS
This parameter is automatically set to the same value as the speed
controller reset time during the speed controller optimization run (P051=26).
(G152)
It may be useful to parameterize lower values when the ramp-function
generator is in use.
SIEMENS Energy & Automation
SIMOREG DC Master Base Drive Panel Operating Instructions
Value range
[Unit]
Steps
0.010 to 10.000
[s]
[SW 1.7 and later]
0.001s
0.01 to 200.00
0.01
0.00 to 100.00
[%]
[SW 1.9 and later]
0.01% of maximum
speed
0.00 to 10.00
[%]
0.01% of maximum
speed
0 to 1
1
0 to 3
1
0.10 to 200.00
0.01
0.010 to 10.000
[s]
0.001s
0.0 to 10.0
[%]
0.1%
0 to 10000
[ms]
1ms
No. indices See
Factory Change
setting (Access /
Type Status)
Ind: None P052 = 3
Type: O2
Ind: None P052 = 3
Type: O2
Ind: 4 P052 = 3
FS=2.00 P051 = 40
Type: O2 Online
Ind: 4 P052 = 3
FS=0.00 P051 = 40
Type: O2 Online
Ind: 4 P052 = 3
FS=0 P051 = 40
Type: O2 Offline
Ind: 4 P052 = 3
FS=1 P051 = 40
Type: O2 Offline
Ind: 4 P052 = 3
FS=3.00 P051 = 40
Type: O2 Online
Ind: 4 P052 = 3
FS=0,650 P051 = 40
Type: O2 Online
Ind: 4 P052 = 3
FS=0.0 P051 = 40
Type: O2 Online
Ind: 4 P052 = 3
FS=0 P051 = 40
Type: O2 Online
10-35