7-18 Trips and Fault Finding
DC590+ Series DC Digital Drive
Setting Trip Conditions
The following parameters in the CALIBRATION and ALARMS menus are used to set trip conditions:
CALIBRATION :: OVER SPEED LEVEL
ALARMS :: SPDFBK ALM LEVEL
ALARMS :: STALL THRESHOLD
ALARMS :: STALL TRIP DELAY
ALARMS :: REMOTE TRIP DELAY
Viewing Trip Conditions
The following parameters in the ALARMS menu can be viewed to investigate trip conditions:
LAST ALARM
HEALTH WORD
HEALTH STORE
THERMISTOR STATE
SPEED FBK STATE
STALL TRIP
REMOTE TRIP
There are ten parameters in the ALARMS HISTORY function block that store the most recent alarm events.
Inhibiting Alarms
The following alarms can be inhibited in the ALARMS menu.
SPEED FBK ALARM
ENCODER ALARM
FIELD FAIL
5703 RCV ERROR
STALL TRIP
TRIP RESET
REM TRIP INHIBIT
The block diagram can be wired to reset a trip condition by using the TRIP RESET parameter in the ALARMS function block. A FALSE to TRUE
transition of this parameter will cause the trip to reset.
NOTE The STALL TRIP parameter in the DIAGNOSTICS menu is set regardless of the state of STALL TRIP inhibit. The flag is set after the stall
time-out expires. The relevant bit (bit 12) in the HEALTH WORD and HEALTH STORE parameters is only set when STALL TRIP is
enabled.
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