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168
Process and Application Parameters [300]
Section 11-3
speed should be used.
Communication information
Example
Max Speed = 1500 rpm
Min Speed = 200 rpm
TransS Start = 60%
When an additional pump is needed, the speed will be controlled down to min
speed + (60% x (1500 rpm - 200 rpm)) = 200 rpm + 780 rpm = 980 rpm.
When this speed is reached, the additional pump with the lowest run time
hours will be switched on.
Fig. 89
Transition speed start
Fig. 90
Effect of transition speed
The settle stop allows the process to settle after a pump is switched off before
the pump control continues. If an additional pump is stopped D.O.L. (Direct On
Line) or Y/
,
the flow or pressure can still fluctuate due to the 'rough' start/
Default:
60%
Range:
0-100% of total min speed to max speed
Modbus Instance no/
DeviceNet no:
43174
Profibus slot/index
169/78
EtherCAT index (hex)
4c67
Fieldbus format
Long, 1=1%
Modbus format
EInt
60%
A
(NG_50-PC-16_1)
Speed
Actual
Trans
Min
Switch on
procedure starts
Additional pump
Master pump
Flow/Pressure
Actual start
command of next
pump (RELAY)
Flow/Pressure
Transition speed
decreases overshoot
Time
Содержание SX-F
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