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167
Process and Application Parameters [300]
Section 11-3
Fig. 88
Lower band limit
Settle Time Start [39D]
The settle start allows the process to settle after a pump is switched on before
the pump control continues. If an additional pump is started D.O.L. (Direct On
Line) or Y/
,
the flow or pressure can still fluctuate due to the 'rough' start/
stop method. This could cause unnecessary starting and stopping of addi-
tional pumps.
During the Settle start:
•
PID controller is off.
•
The speed is kept at a fixed level after adding a pump.
Communication information
Transition Speed Start [39E]
The transition speed start is used to minimize a flow/pressure overshoot when
adding another pump. When an additional pump needs to be switched on, the
master pump will slow down to the set transition speed start value, before the
additional pump is started. The setting depends on the dynamics of both the
master drive and the additional drives.
The transition speed is best set by trial and error.
In general:
•
If the additional pump has 'slow' start/stop dynamics, then a higher transi-
tion speed should be used.
•
If the additional pump has 'fast' start/stop dynamics, then a lower transition
Default:
0 s
Range:
0-999 s
Modbus Instance no/
DeviceNet no:
43173
Profibus slot/index
169/77
EtherCAT index (hex)
4c65
Fieldbus format
Long, 1=1 s
Modbus format
EInt
(NG_50-PC-15_2)
Speed
Max
Min
Lower band
Stop Delay [39A]
Lower band
limit [39C]
“top” pump stops
immediately
Flow/Pressure
A
0s
Содержание SX-F
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Страница 14: ...6 Table of contents...
Страница 20: ...12 Glossary Section 1 6...
Страница 32: ...24 Cabinet mounting Section 2 3...
Страница 58: ...50 Connecting options Section 5 6...
Страница 72: ...64 Load Monitor and Process Protection 400 Section 7 5...
Страница 74: ...66 EMC standards Section 8 1...
Страница 266: ...258 System Data 900 Section 11 9...
Страница 274: ...266 Maintenance Section 12 3...
Страница 284: ...276 Liquid cooling Section 13 12...