Multi-Pump - Siemens bt300 Operator's Manual

Structure Parameter
P3.14.6 Autoch:FreqLim
P3.14.7 AutochMotorLimit
P3.14.8 Bandwidth
P3.14.9 Bandwidth Delay

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.
Siemens Industry, Inc.
Building Technologies
Unit Min
Hz 0 50
0 4
% 0 100
s 0 3600
Figure 31:
Siemens BT300 HVAC Drive
Chapter 4 - Parameters and Menu Structure
Max Default ID
25 1031
1 1030
10 1097
10 1098
Parameters (M3)
Description
Defines the level which the auto
change is capable to take place.
Defines the level which the auto
change is capable to take place.
Percentage of the setpoint.
Feedback outside the bandwidth,
time must pass before pumps are
added or removed.
101 | 180
DPD01809
2016-06-07