Figure 10-10 Pi Basic Block Diagram; Pi Output Limits - Siemens MICROMASTER 411 Operating Instructions Manual

10 Engineering Information
10.2.4

PI Output Limits

The PI controller generates the frequency at which the inverter runs. This is
generated as a % which is normalized into Hz via P2000. The user can limit the
output range of the controller using parameters P2291 and P2292. While the
inverter will only operate within the frequency range defined by F
F (P1082), the PI output limits can be used to further limit the output frequency.
max
Once one of the limits has been reached a bit is set (P0053.A or P0053.B) which
can be connected to the digital output via P0731, or used for internal control
purposes using BiCo.
NOTE:
If F (P1082) is greater than the value in P2000, then either P2000 or P2291
max
should be adjusted to allow F
Setting P2292 to a negative value allows bipolar operation of the PI controller.
10.2.5 Further features
Further features, such as a PI setpoint trim can be accessed in user access level 3
(P0003 = 3). These features are described in the Parameter List.
PID
MOP
ADC
PID
FF
USS
BOP link
USS
COM link
CB
COM link
ADC2

Figure 10-10 PI Basic Block Diagram

128
to be reached.
max
P2254
PID PID
P2253
SUM RFG
PID
P2253
PT1
P2200
MICROMASTER 411 & COMBIMASTER 411
PID
PID
PT1
PID
Output
PID
PID
SCL
Issue 03/01
(P1080) and
min
0
Motor
control
1
Operating Instructions
6SE6400-5CA00-0BP0