Emotron FDU Series, Instruction Manual, Page: 81 / 260

CG Drives & Automation 01-7491-01r0 Main Features 77
7.6.8 Functional Examples of Start/
Stop Transitions
Starting an additional pump
This figure shows a possible sequence with all levels and
functions involved when a additional pump is started by
means of the pump control relays. The starting of the
second pump is controlled by one of the relay outputs. The
relay in this example starts the pump directly on line. Of
course other start/stop equipment, like a soft starter, could
be controlled by the relay output.
Fig. 87 Time sequence starting an additional pump.
Flow
Set view ref. [310]
Feedback Flow
time
Master pump
Max speed
Speed
Transition Speed Start
Min speed
Lower band
Upper band
Start delay [399] Settle time start [39D]
Start ramp depends
on start method
Start command
Speed
2nd pump
time
time
[39E]
[343]
[341]