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CG Drives & Automation,01-5326-01r3b
FFunctional Description
111
Acceleration Time to Minimum Speed
[335]
If minimum speed, [341]>0 rpm, is used in an application,
the AC drive uses separate ramp times below this level. With
“Acc>MinSpeed [335]” and “Dec<MinSpeed [336]” you can
set the required ramp times. Short times can be used to
prevent damage and excessive pump wear due too little
lubrication at lower speeds. Longer times can be used to fill
up a system smoothly and prevent water hammer due to
rapidly exhausting air from the pipe system.
If a Minimum speed is programmed, this parameter will be
used to select the acceleration time parameter [335] for
speeds up to minimum speed at a run command. The ramp
time is defined as the time it takes for the motor to
accelerate from 0 rpm to nominal motor speed.
Communication information
Fig. 84 Calculation example of accelerating times
(graphics not proportional).
Example:
“Motor speed [225]”
3000 rpm
Minimum speed [341]
600 rpm
Maximum speed [343]
3000 rpm
Acceleration time [331]
10 seconds
Deceleration time [332]
10 seconds
Acc>Min speed[335]
40 seconds
Dec<Min speed[336]
40 seconds
A. The drive will start from 0 rpm and accelerate to
Minimum speed [341] = 600 rpm in 8 seconds
according to ramp time parameter
Acc>Min speed [335].
Calculated as following:
600 rpm is 20% of 3000 rpm => 20% of 40 s = 8 s.
B. The acceleration continues from minimum speed level
600 rpm to maximum speed level 3000 rpm with
acceleration rate according to ramp time Acceleration
time [331].
Calculate by following:
3000 - 600= 2400 rpm which is 80 % of 3000 rpm =>
acceleration tim is 80 % x 10 s = 8 s.
This means that the total acceleration time from 0 -
3000 rpm will take 8 + 8 = 16 seconds.
Deceleration Time from Minimum
Speed [336]
If a minimum speed is programmed, this parameter will be
used to set the deceleration time from the minimum speed
to 0 rpm at a stop command. The ramp time is defined as
the time it takes for the motor to decelerate from the
nominal motor speed to 0 rpm.
Communication information
Default:
10.0 s
Range:
0-3600 s
Modbus Instance no/DeviceNet no:
43105
Profibus slot/index
169/9
EtherCAT index (hex)
4c21
Profinet IO index
19489
Fieldbus format
Long, 1=0.01 s
Modbus format
EInt
335 Acc>Min Spd
Stp
10.0s
time
rpm
Motor Speed
Max speed
Min speed
[341]
[343]
[225]
3000
600
Default:
10.0 s
Range:
0-3600 s
Modbus Instance no/DeviceNet no:
43106
Profibus slot/index
169/10
EtherCAT index (hex)
4c22
Profinet IO index
19490
Fieldbus format
Long, 1=0.01 s
Modbus format
EInt
336 Dec<Min Spd
Stp
10.0s
9(0R'ULYH 96, 9(0 U
Содержание VEMoDRIVE VSI 2.0 HD
Страница 1: ...Frequency converter VEMoDRIVE VSI 2 0 HD Instruction manual 01 5326 01 04 2018...
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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...
Страница 198: ...196 CG Drives Automation 01 5326 01r3b 9 0R ULYH 96 9 0 U...
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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