Actual signals and parameters
192
25 CRITICAL SPEEDS
Speed bands within which the drive is not allowed to operate.
2501
CRIT SPEED SEL
Activates/deactivates the critical speeds function. The critical speed function
avoids specific speed ranges.
Example:
A fan has vibrations in the range of 18 to 23 Hz and 46 to 52 Hz.
To make the drive to jump over the vibration speed ranges:
- Activate the critical speeds function.
- Set the critical speed ranges as in the figure below.
OFF
OFF
Inactive
0
ON
Active
1
2502
CRIT SPEED 1 LO
Defines the minimum limit for critical speed/frequency range 1.
0
0.0…500.0 Hz /
0…30000 rpm
Limit in rpm. Limit in Hz if parameter
MOTOR CTRL MODE setting is
SCALAR:FREQ. The value cannot be above the maximum (parameter
CRIT SPEED 1 HI).
1 = 0.1 Hz /
1 rpm
2503
CRIT SPEED 1 HI
Defines the maximum limit for critical speed/frequency range 1.
0
0.0…500.0 Hz /
0…30000 rpm
Limit in rpm. Limit in Hz if parameter
MOTOR CTRL MODE setting is
SCALAR:FREQ. The value cannot be below the minimum (parameter
CRIT SPEED 1 LO).
1 = 0.1 Hz /
1 rpm
2504
CRIT SPEED 2 LO
CRIT SPEED 1 LO.
0
0.0…500.0 Hz /
0…30000 rpm
1 = 0.1 Hz /
1 rpm
2505
CRIT SPEED 2 HI
CRIT SPEED 1 HI.
0
0.0…500.0 Hz /
0…30000 rpm
1 = 0.1 Hz /
1 rpm
2506
CRIT SPEED 3 LO
CRIT SPEED 1 LO.
0
0.0…500.0 Hz /
0…30000 rpm
1 = 0.1 Hz /
1 rpm
2507
CRIT SPEED 3 HI
CRIT SPEED 1 HI.
0
0.0…500.0 Hz /
0…30000 rpm
1 = 0.1 Hz /
1 rpm
26 MOTOR CONTROL
Motor control variables
2601
FLUX OPT ENABLE
Activates/deactivates the flux optimisation function. Flux optimisation
reduces the total energy consumption and motor noise level when the drive
operates below the nominal load. The total efficiency (motor and the drive)
can be improved by 1% to 10%, depending on the load torque and speed.
The disadvantage of this function is that the dynamic performance of the
drive is weakened.
OFF
Parameters – complete descriptions
Index Name/Selection
Description
Def, FbEq
f
reference
(Hz)
18
23
46
52
f
output
(Hz)
1
= 18 Hz
2
= 23 Hz
3
= 46 Hz
4
= 52 Hz
1 2 3 4
Summary of Contents for ACS350 Series
Page 1: ...ACS350 User s Manual ACS350 Drives 0 37 22 kW 0 5 30 HP ...
Page 4: ......
Page 8: ...Safety 8 ...
Page 18: ...Table of contents 18 ...
Page 24: ...Hardware description 24 ...
Page 44: ...Installation checklist 44 ...
Page 56: ...Start up control with I O and ID Run 56 ...
Page 140: ...Program features 140 ...
Page 242: ...Actual signals and parameters 242 ...
Page 266: ...Fieldbus control with embedded fieldbus 266 ...
Page 284: ...Fault tracing 284 ...
Page 288: ...Maintenance and hardware diagnostics 288 ...
Page 309: ...Dimensions 309 Frame size R2 IP20 NEMA 1 3AFE68586658 A Frame size R2 IP20 NEMA 1 VAR EMC ...
Page 311: ...Dimensions 311 Frame size R3 IP20 NEMA 1 3AFE68579872 B Frame size R3 IP20 NEMA 1 VAR EMC ...
Page 313: ......