ABB ACS850 series, Manual

Page: 84 / 370

84 Program features
Stall protection (parameters 30.09 … 30.12 )
The drive protects the motor in a stall situation. It is possible to adjust the supervision
limits (current, frequency and time) and choose how the drive reacts to a motor stall
condition.
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Automatic fault resets
The drive can automatically reset itself after overcurrent, overvoltage, undervoltage,
external and “analog input below minimum” faults. By default, automatic resets are off
and must be separately activated by the user.
Settings
Parameter group 32 Automatic reset (page 200 ).
Diagnostics
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Signal supervision
Three signals can be selected to be supervised by this function. Whenever the signal
exceeds (or falls below) a predefined limit, a bit of
06.13 Superv status is activated.
Absolute values can be used.
Settings
Parameter group 33 Supervision (page 201 ).
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Maintenance counters
The program has six different maintenance counters that can be configured to
generate an alarm when the counter reaches a pre-defined limit. The counter can be
set to monitor any parameter. This feature is especially useful as a service reminder.
There are three types of counters:
• Ontime counter. Measures the time a digital source (for example, a bit in a status
word) is on.
• Rising edge counter. This counter is incremented whenever the monitored digital
source changes state from 0 to 1.
• Value counter. This counter measures, by integration, the monitored parameter.
An alarm is given when the calculated area below the signal peak exceeds a
user-defined limit.
Settings
Parameter group 44 Maintenance (page 224 ).