Overspeed Protection (Parameter 31.30); Ramp Stop Supervision (Parameters 31.32, 31.33, 31.37 And 31.38); Main Cooling Fan Supervision (Parameter 31.35); Custom Motor Current Fault Limit (Parameter 31.42) - ABB ACS880 Manual

Primary control program

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Table of Contents

98 Program features

Overspeed protection (parameter 31.30)

The user can set overspeed limits by specifying a margin that is added to the

currently-used maximum and minimum speed limits.

The control program has a supervision function for both the normal and emergency stop

ramps. The user can either define a maximum time for stopping, or a maximum deviation

from the expected deceleration rate. If the drive fails to stop in the expected manner, a

fault is generated and the drive coasts to a stop.

The parameter selects how the drive reacts to a loss of the main cooling fan.

With an inverter unit consisting of frame R8i inverter modules, it may be possible to

continue operation even if a cooling fan of an inverter module stops. See the description

of the parameter.

The control program sets a motor current limit based on drive hardware. In most cases,

the default value is appropriate. However, a lower limit can be manually set by the user,

for example, to protect a permanent magnet motor from demagnetization.

The parameter selects how the drive reacts to a control panel or PC tool communication