Troubleshooting
table (cont’d)
Problem (and system
status numbers)
Possible cause
Action
Drive transition from
UnConfigured to Configure
while enabled (E6)
Hardware Enable input
active.
Disable hardware Enable
input. Re-configure drive
then cycle power.
Enable inactive during
several configurations,
drive still faults.
Return for repair.
Two AInNull events too
close together. (E7)
Connection to AInNull
input has switch bounces.
Use BDOutX to trigger the
AInNull input. Replace
switch if no fault occurs.
Following error overflow
(F1)
CwInh and/or CcwInh held
low while commanding
motion.
Check CwInh and CcwInh
inputs and variables.
Loss of feedback
information.
Disable drive and spin
motor shaft by hand.
Verify Position variable is
changing. If not, swap out
motor/cables or drive with
know good spare to isolate
defective part.
Open motor phase.
Check wiring and motor
winding for open circuit.
Loss of motor power.
Bus voltage is low.
Tuning Wizard incomplete. No motor selected,
therefore cannot respond.
User Program Checksum
Fault (F2)
Checksum fault while
reading user program
memory during power up.
Cycle AC power.
Download the program.
Memory allocation error.
Program is writing to a
variable address location
that has not been
dimensioned.
Check Dim section of
program for string variables
and arrays.
5 - 10
MA950
