Trips and Fault Finding
Page 10-6 890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
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6511
Keypad
Display
6901
Keypad
Display
Description Possible Reason for Trip
STLL MOTOR STALLED The motor has stalled (not
rotating)
♦ Motor loading too great
♦ Current limit level is set too low
♦ Stall trip duration is set too low
♦ Fixed or auto boost levels are set too high
IT INVERSE TIME
♦ The inverse time current limit is active: motor loading
is too great; fixed or autoboost levels are too high
(Full Load Current = 150% for 60 seconds)
DB R BRAKE RESISTOR External dynamic braking
resistor has been overloaded
♦ Trying to decelerate a large inertia load too quickly or
too often
DB S BRAKE SWITCH Internal dynamic braking
switch has been overloaded
♦ Trying to decelerate a large inertia load too quickly or
too often
DISP OP STATION Keypad has been
disconnected from drive
whilst drive is running in
local control
♦ Keypad accidentally disconnected from drive
SCI LOST COMMS Can't refresh the COMMS
COMMAND parameter
♦ COMMS TIMEOUT parameter set too short (refer to
COMMS CONTROL menu at level 3)
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