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.
Main cooling fan supervision (parameter
31.35
)
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.
Custom motor current fault limit (parameter
31.42
)
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.
Local control loss detection (parameter
49.05
)
The parameter selects how the drive reacts to a control panel or PC tool
communication break.
Diagnostics
￭
Fault and warning messages, data logging
See chapter Fault tracing (page 547).
￭
Signal supervision
Three signals can be selected to be supervised by this function. Whenever a
supervised signal exceeds or falls below predefined limits, a bit in 32.1 is activated,
and a warning or fault generated. The contents of the message can be edited on
the control panel by selecting Menu - Settings - Edit texts.
The supervised signal is low-pass filtered. The supervision operates on a 2 ms time
level. The configuration parameters are scanned for changes on a 10 ms time level.
Settings and diagnostics
Parameter group: 32 Supervision (page 328).
Events: A8B0 Signal supervision (page 587), A8B1 Signal supervision 2 (page 587),
A8B2 Signal supervision 3 (page 587), 80B0 Signal supervision (page 569), 80B1 Signal
supervision 2 (page 569) and 80B2 Signal supervision 3 (page 569).
￭
Maintenance timers and counters
The program has six different maintenance timers or counters that can be
configured to generate a warning when a pre-defined limit is reached. The contents
118 Program features
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