Siemens SINAMICS V20 Series, Operating Instructions Manual

Page: 206 / 274

Parameter list
7.2 Parameter list
SINAMICS V20 Inverter
206
Operating Instructions, 07/2012, A5E03728167
Parameter Function Range Factory
default Can be
changed Scaling Data
set Data
type Acc.
Level
P2285 PID integral time [s] 0.000 -
60.000
0.000 U, T - - Float 2
Sets integral time constant for PID controller.
Note: See P2280
P2291 PID output upper limit
[%]
-200.00 -
200.00
100.00 U, T - - Float 2
Sets upper limit for PID controller output
Dependency: If f_max (P1082) is greater than P2000 (reference frequency), either P2000 or P2291 (PID output upper
limit) must be changed to achieve f_max.
Note: P2291 = 100 % corresponds to 4000 hex (as defined by P2000 (reference frequency)).
P2292 PID output lower limit [%] -200.00 -
200.00
0.00 U, T - - Float 2
Sets lower limit for the PID controller output.
Dependency: A negative value allows bipolar operation of PID controller.
Note:
P2292 = 100 % corresponds to 4000 hex.
P2293 Ramp-up / -down time of
PID limit [s]
0.00 -
100.00
1.00 U, T - - Float 3
Sets maximum ramp rate on output of PID.
When PI is enabled, the output limits are ramped up from 0 to the limits set in P2291 (PID output upper
limit) and P2292 (PID output lower limit). Limits prevent large step changes appearing on the output of the
PID when the inverter is started. Once the limits have been reached, the PID controller output is
instantaneous. These ramp times are used whenever a RUN command is issued.
Note: If an OFF1 or OFF 3 are issued, the inverter output frequency ramps down as set in P1121 (ramp-down
time) or P1135 (OFF3 ramp-down time).
r2294 CO: Actual PID output
[%]
- - - - - Float 2
Displays PID output.
Note: r2294 = 100 % corresponds to 4000 hex.
P2295 Gain applied to PID
output
-100.00 -
100.00
100.00 U, T - - Float 3
Allows the user to scale the PID output as a percentage value. A gain of 100.0 % means that output signal
has not changed from its default value.
Note: The ramp rate applied by the PID controller is clamped to a rate of 0.1s / 100% to protect the inverter.
P2350 PID autotune enable 0 - 4 0 U, T - - U16 2
Enables autotune function of PID controller.
0 PID autotuning disabled
1 PID autotuning via Ziegler Nichols (ZN) standard
2 PID autotuning as 1 plus some overshoot (O/S)
3 PID autotuning as 2 little or no overshoot (O/S)
4 PID autotuning PI only, quarter damped response
Dependency: Active when PID loop is enabled (see P2200).
Note:
•
P2350 = 1
This is the standard Ziegler Nichols (ZN) tuning which should be a quarter damped response to a step.
•
P2350 = 2
This tuning will give some overshoot (O/S) but should be faster than option 1.
•
P2350 = 3
This tuning should give little or no overshoot but will not be as fast as option 2.