25 Critical Speeds - ABB ACS150 series User Manual

104
Parameters in the Long parameter mode
Index Name/Selection

25 CRITICAL SPEEDS

2501 CRIT SPEED SEL
0 = OFF
1 = ON
2502 CRIT SPEED 1 LO
0.0...500.0 Hz
2503 CRIT SPEED 1 HI
0.0...500.0 Hz
2504 CRIT SPEED 2 LO
0.0...500.0 Hz
2505 CRIT SPEED 2 HI
0.0...500.0 Hz
2506 CRIT SPEED 3 LO
0.0...500.0 Hz
2507 CRIT SPEED 3 HI
0.0...500.0 Hz
Actual signals and parameters
Description
Speed bands within which the drive is not allowed to operate.
A Critical Speeds function is available for applications where it is necessary
to avoid certain motor speeds or speed bands because of for example,
mechanical resonance problems. The user can define three critical speeds or
speed bands.
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.
f (Hz)
output
52
46
23
18
1 2 3 4
Inactive
Active
Defines the minimum limit for critical speed/frequency range 1.
Limit. The value cannot be above the maximum (parameter
SPEED 1 HI).
Defines the maximum limit for critical speed/frequency range 1.
Limit. The value cannot be below the minimum (parameter
SPEED 1 LO).
See parameter 2502 CRIT SPEED 1 LO.
See parameter 2502.
See parameter 2503 CRIT SPEED 1 HI.
See parameter 2503.
See parameter 2502 CRIT SPEED 1 LO.
See parameter 2502.
See parameter 2503 CRIT SPEED 1 HI.
See parameter 2503.
1 Par. 2502 = 18 Hz
2 Par. 2503 = 23 Hz
3 Par. 2504 = 46 Hz
4 Par. 2505 = 52 Hz
f (Hz)
reference
2503
2502
Def
0 = OFF
0.0 Hz
CRIT
0.0 Hz
CRIT
0.0 Hz
0.0 Hz
0.0 Hz
0.0 Hz