CG Drives & Automation,01-5326-01r3b
FFunctional Description
135
Settle Time Stop [39F]
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/stop method. This could cause unnecessary starting
and stopping of additional pumps.
During the Settle stop:
•
PID controller is off.
•
the speed is kept at a fixed level after stopping a pump
Communication information
Transition Speed Stop [39G]
The transition speed stop is used to minimize a flow/
pressure overshoot when shutting down an additional pump.
The setting depends on the dynamics of both the master
drive and the additional drives.
In general:
•
If the additional pump has 'slow' start/stop dynamics,
then a higher transition speed should be used.
•
If the additional pump has 'fast' start/stop dynamics,
then a lower transition speed should be used.
Communication information
Example
Max Speed = 1500 rpm
Min Speed = 200 rpm
TransS Start = 60%
When less additional pumps are needed, the speed will be
controlled up 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 highest run time
hours will be switched off.
Fig. 105 Transition speed stop
Default:
0 s
Range:
0–999 s
Modbus Instance no/DeviceNet no:
43175
Profibus slot/index
169/79
EtherCAT index (hex)
4c67
Profinet IO index
19559
Fieldbus format
Long, 1=1 s
Modbus format
EInt
Default:
60%
Range:
0-100% of total min speed to max speed
Modbus Instance no/DeviceNet no:
43176
Profibus slot/index
169/80
EtherCAT index (hex)
4c68
Profinet IO index
19560
Fieldbus format
Long, 1=1%
Modbus format
EInt
Δ
39F Settle Stop
Stp
0s
39G TransS Stop
Stp
60%
NOTE: If set to 0 %, the transition speed when stopping
pumps, is ignored and no speed adaption is made.
I.e. the slave pump is stopped directly and speed of the
master pump is continued.
Speed
Max
Trans
Actual
Min
Actual shut down of pump
Master pump
Switch off procedure starts
Additional pump
Flow/Pressure
9(0R'ULYH 96, 9(0 U
Содержание VEMoDRIVE VSI 2.0 HD
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Страница 40: ...38 Installation CG Drives Automation 01 5326 01r3b 9 0R ULYH 96 9 0 U...
Страница 52: ...50 Getting Started CG Drives Automation 01 5326 01r3b 9 0R ULYH 96 9 0 U...
Страница 64: ...62 EMC and standards CG Drives Automation 01 5326 01r3b 9 0R ULYH 96 9 0 U...
Страница 142: ...140 Functional Description CG Drives Automation 01 5326 01r3b 9 0R ULYH 96 9 0 U...
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Страница 206: ...204 Troubleshooting Diagnoses and Maintenance CG Drives Automation 01 5326 01r3b 9 0R ULYH 96 9 0 U...
Страница 232: ...230 Technical Data CG Drives Automation 01 5326 01r3b 9 0R ULYH 96 9 0 U...
Страница 238: ...236 Menu List CG Drives Automation 01 5326 01r3b 9 0R ULYH 96 9 0 U...
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