Operating Instructions

Chapter 4 - Parameters and Menu Structure
Parameters (M3)
108 | 187
Siemens Industry, Inc.
Siemens BT300 HVAC Drive
DPD01809
Smart Infrastructure
2019-05-29
Structure
Parameter
Unit
Min
Max
Default
ID
Description
P3.14.6
Autoch:FreqLim
Hz
0
50
25
1031
Defines the level which the auto
change is capable to take place.
P3.14.7
AutochMotorLimit
0
4
1
1030
Defines the level which the auto
change is capable to take place.
P3.14.8
Bandwidth
%
0
100
10
1097
Percentage of the setpoint.
P3.14.9
Bandwidth Delay
s
0
3600
10
1098
Feedback outside the bandwidth,
time must pass before pumps are
added or removed.
Multi-Pump
Motors are connected/disconnected if the PID controller is not able to keep the process value or feedback
within the defined bandwidth around the setpoint.
Criteria for connecting/adding motors (also see the following figure):
● Feedback value outside the bandwidth area.
● Regulating motor running at a “close-to-max” frequency (-2 Hz).
● Conditions above are fulfilled for a time longer than the bandwidth delay.
● There are additional motors available.
Figure 31: