ABB ACS880 User Manual page 22
Safely-limited speed without the encoder interface (option +q966) for multidrives
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Also See for ACS880:
- Firmware manual (764 pages) ,
- Manual (646 pages) ,
- Quick start up manual (146 pages)
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22 Option description
Example 1: Modoff delay time – modulation returns before modoff delay
In this example, parameter SLSx.05 is set to Modoff delay time. The time diagram below
describes the operation of the SLS function when modulation is lost during the deceleration
ramp, and the modulation returns before the modoff delay time has run out.
Motor speed
A
A
SAR1 ramp monitoring
B
Actual motor speed (coasting after modoff)
C
SLS trip limit
D
SLS limit
A
B
C
D
Time
SLS request
SAR1 monitoring
Drive modulation
SLSx.06 Modoff
delay time monitoring
SLS monitoring
SLS indication
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