Critical Speeds - ABB ACS310 User Manual

All parameters
No. Name/Value
DI1
DI2
DI3
DI4
DI5
COMM
DI1(INV)
DI2(INV)
DI3(INV)
DI4(INV)
DI5(INV)
25 CRITICAL
SPEEDS
2501 CRIT SPEED
SEL
OFF
ON
2502 CRIT SPEED 1
LO
0.0...500.0 Hz
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Description
Digital input DI1. 1 = ramp input is forced to zero. Ramp
output ramps to zero according to the used ramp time.
See selection DI1.
See selection DI1.
See selection DI1.
See selection DI1.
Fieldbus interface as the source for forcing ramp input to
zero, ie Control word
ABB drives profile 5319 EFB PAR 19
word is sent by the fieldbus controller through the
embedded fieldbus (Modbus) to the drive. For the Control
word bits, see sections
307 and ABB drives communication profile
Inverted digital input DI1. 0 = ramp input is forced to zero.
Ramp output ramps to zero according to the used ramp
time.
See selection DI1(INV).
See selection DI1(INV).
See selection DI1(INV).
See selection DI1(INV).
Speed (output frequency) bands within which the drive is not
allowed to operate.
Activates/deactivates the critical speeds function. The
critical speed function avoids specific output frequency
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 frequency ranges:
• Activate the critical speeds function.
• Set the critical frequency 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 output frequency range
1
Limit in Hz. The value cannot be above the maximum
(parameter 2503 CRIT SPEED 1
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Actual signals and parameters 207
0301 FB CMD WORD 1
bit 6). The Control
DCU communication profile
1 Par. 2502
2 Par. 2503
3 Par. 2504
4 Par. 2505
f (Hz)
reference
HI).
Industry Automation
Def/FbEq
1
2
3
4
5
7
bit 13 (with
on page
on page 302.
-1
-2
-3
-4
-5
OFF
= 18 Hz
= 23 Hz
= 46 Hz
= 52 Hz
0
1
0.0 Hz
1 = 0.1 Hz
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