198 Actual signals and parameters
Group 25: Critical speeds
This group defines up to three critical speeds or ranges of speeds that are to be
avoided due, for example, to mechanical resonance problems at certain speeds.
Group 25: Critical speeds
Code
Description
Range
Resolution
Default
S
2501
CRIT SPEED SEL
0, 1
1
0
Sets the critical speeds function on or
off. The critical speed function avoids
specific speed ranges.
0 = OFF – Disables the critical speeds
function.
1 = ON – Enables the critical speeds
function.
Example: To avoid speeds at which a
fan system vibrates badly:
• Determine problem speed ranges.
Assume they are found to be:
18…23 Hz and 46…52 Hz.
• Set 2501 CRIT SPEED SEL = 1.
• Set
= 18
Hz.
• Set
= 23 Hz.
• Set
= 46 Hz.
• Set
= 52 Hz.
2502
CRIT SPEED 1 LO
0.0 … 500.0 Hz
0.1 Hz
0.0 Hz
Sets the minimum limit for critical speed range 1.
• Value must be less than or equal to
• Units are rpm.
2503
CRIT SPEED 1 HI
0.0 … 500.0 Hz
0.1 Hz
0.0 Hz
Sets the maximum limit for critical speed range 1.
• Value must be greater than or equal to
• Units are rpm.
2504
CRIT SPEED 2 LO
0.0 … 500.0 Hz
0.1 Hz
0.0 Hz
Sets the minimum limit for critical speed range 2.
• See parameter
2505
CRIT SPEED 2 HI
0.0 … 500.0 Hz
0.1 Hz
0.0 Hz
Sets the maximum limit for critical speed range 2.
• See parameter
2506
CRIT SPEED 3 LO
0.0 … 500.0 Hz
0.1 Hz
0.0 Hz
Sets the minimum limit for critical speed range 3.
• See parameter
f
output
52
46
23
18
f
REF
(Hz)
f1L
18
f2L
46
f1H
23
f2H
52
Summary of Contents for ACS320 series
Page 1: ...ABB drives User s manual ACS320 drives 0 5 to 30 hp ...
Page 4: ......
Page 18: ...18 Safety ...
Page 28: ...28 Operation principle and hardware description ...
Page 56: ...56 Electrical installation ...
Page 142: ...142 Program features Connection diagram example ACS320 xx xxxx x ...
Page 282: ...282 Actual signals and parameters ...
Page 358: ...358 Fieldbus control ...
Page 376: ...376 Fault tracing ...
Page 382: ...382 Maintenance and hardware diagnostics ...
Page 407: ...Dimension drawings 407 Frame size R2 NEMA 1 Frame size R2 IP20 NEMA 1 3AUA0000051097 A ...
Page 409: ...Dimension drawings 409 Frame size R3 NEMA 1 Frame size R3 IP20 NEMA 1 3AUA0000051118 A ...
Page 411: ...Dimension drawings 411 Frame size R4 NEMA 1 Frame size R4 IP20 NEMA 1 3AUA0000051133 A ...
Page 412: ...412 Dimension drawings ...
Page 413: ...Index Numerics A B C D E F G H I K L M N O P R S T ...