Eurotherm 590L Series, Product Manual, Page: 105 / 170

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When a trip occurs, the converter's power stage is immediately disabled causing the motor and
load to coast to a stop. The trip is latched until action is taken to reset it. This ensures that trips
due to transient conditions are captured and the Converter is disabled, even when the original
cause of the trip is no longer present.
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If a trip condition is detected the unit displays and performs the following actions.
1. The HEALTH LED goes out indicating a Trip condition has occurred. The MMI displays
the activated alarm. (Investigate, find and remove the cause of the trip.)
2. The alarm message(s) can be acknowledged by pressing the E key, however, the unit will
not restart at this point.
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All trips must be reset before the Converter can be re-enabled. A trip can only be reset once the
trip condition is no longer active, i.e. a trip due to a heatsink over-temperature will not reset until
the temperature is below the trip level.
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You can reset the trip(s) in one of two ways:
1. Power -up, or remove and re-apply the auxiliary power supply.
2. Stop and start the converter, i.e. remove and re-apply the Start/Run signal.
Success is indicated by the MMI’s HEALTH LED illuminating. The display will return to its
original display.
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When a trip occurs an alarm message is displayed on the MMI, and information about the trip is
stored in the ALARM STATUS menu.
The alarm message and the LAST ALARM parameter are displayed
in the selected language of the MMI.
The HEALTH STORE and HEALTH WORD parameters display
information as hexadecimal values, or the sum of the hexadecimal
values when more than one alarm is active. Thus the unique value
can represent one or more alarms.
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This display shows the last alarm message to have been displayed. To reset the parameter simply
press the
↓↓↓↓
(DOWN) key to clear the alarm. Alternatively, you can switch the auxiliary supply
off and on, causing NO ACTIVE ALARMS to be displayed.
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ALARM STATUS
LAST ALARM
HEALTH WORD
HEALTH STORE