Siemens A1 User Manual
Real Applications
International English
38
MICROMASTER Applications Handbook
7.2.3
Key Parameter Details
Table 7-2
Fan Application with Closed Loop Control
Number Value Meaning
P1000
1
Digital set point preset in MIDIMASTER. Manual adjustment not normally
required.
required.
P1040 20 Nominal
setpoint
P0003
3
Allows all parameters to be adjusted and set.
P1080
10
Minimum fan speed
P1082 30 Maximum
fan
speed
P0778
4.00
Analog output 4 – 20 mA indicating output frequency. This signal is used as
part of the overall factory management system. Setting P0778 applies a
4 mA offset.
part of the overall factory management system. Setting P0778 applies a
4 mA offset.
P1300
2
Quadratic V/F curve selected. Selecting the quadratic curve allows a higher
continuous output, but limits the overload capability, which is not needed in
this case. The quadratic curve also reduces the power consumption
because it is optimised for fan and pump applications.
continuous output, but limits the overload capability, which is not needed in
this case. The quadratic curve also reduces the power consumption
because it is optimised for fan and pump applications.
P0300-
P0311
P0311
***
Settings to suit motor
P201
1
PID enabled. The following parameters give the best overall stability in this
particular application.
particular application.
P202 0.3 P
Gain
P203 0.06 I
Gain
P204 0 D
Gain
P205 1 Sample
Interval
P206 0 Sensor
Filtering
P207
100
Integral capture range
P208 1 Sensor
type
P211
25
0% set point
P212
80
100% set point
P220
1
Switch off at minimum frequency
P0761
2
PI analog input 4 –20 mA to suit flow transducer