Alarm Messages - Parker 590+ DRV Product Manual

7-8
Trips and Fault Finding

Alarm Messages

The drive continuously monitors alarms whilst running. These alarms are gated together to provide an overall "drive healthy"
logic variable. This variable corresponds to the ALARM STATUS software block output HEALTHY (tag number 122). By
default the HEALTHY logic parameter is tagged to terminal B6 (DIGOUT 2).
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 when viewed on the MMI.
The HEALTH STORE, HEALTH WORD and ALARM HISTORY 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.
NOTE
Hexadecimal refers to the common practice of counting to the base of 16 in computing rather than the base of 10. The sixteen `numbers' used
being 0 to 9, A to F. Thus an 8 bit byte is represented by two characters in the range 00 to FF, while a 16 bit word is represented by four
characters in the range 0000 to FFFF.
LAST ALARM
(Tag 528). This display shows the last alarm message to have been displayed. To reset the parameter simply press the
alarm. Alternatively, you can switch the auxiliary supply off and on, causing NO ACTIVE ALARMS to be displayed.
NOTE
The LAST ALARM value is presented in hexadecimal format when viewed in DSELite or when used in the Block Diagram.
HEALTH WORD
(Tag 115).This parameter is used to continuously monitor the status of the Drive. As alarms are added or removed, the display will immediately update
to show the hexadecimal sum of these alarms.
The value reverts to 0x0000 when the Start (C3) input is raised (+24V), and when no trip condition is present.
HEALTH STORE
(Tag 116).This displays the hexadecimal value of the first (or only) alarm to occur causing the trip condition.
The display reverts to 0x0000 when the Start (C3) input is raised (+24V).
ALARM HISTORY
The most recent 10 alarm events are stored in the ALARM HISTORY function block, with the oldest in parameter
ALARM 10 (OLDEST), and most recent in ALARM 1 (NEWEST). As with the HEALTH STORE and HEALTH WORD
parameters, the alarm history is stored as four character hexadecimal numbers.
MMI Menu Map
1
ALARM STATUS
LAST ALARM
HEALTH WORD
HEALTH STORE
(DOWN) key to clear the
DC590+ DRV Series DC Digital Drive