Trips and Fault Finding
8
9
10
11
A
B
C
D
1
2
3
4
5
6
7
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 COMMS
BREAK
♦
COMMS BREAK parameter set to True (refer to I/O
TRIPS menu at level 3)
E
Page
10-6
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D