Error Messages 67
Error Cause Remedy
“X POLARITY REVERSED”
“Y POLARITY REVERSED”
“Z POLARITY REVERSED”
Encoder count indicates
backward motion
Check wiring.
Test Limit Switch(es) for that
axis. A failed limit switch
opposite travel direction will
result in the Tower receiving
info that registers as motion
in reverse of command.
Beep Codes Cause Remedy
1 beep
Flash memory not loaded Check Flash memory.
2 beeps
RAM error Check RAM.
3 beeps
Hardware Board error (incorrectly
reads a ‘known’ I/O address)
Replace CPU board.
4 beeps
Flash write error Check Flash memory.
5 beeps
Can’t communicate with keyboard Check keyboard and connections.
6 beeps
not used
7 beeps
Servo system Axis error See remedies for Axis errors
above.
8 beeps
Multifunction Peripheral chip
error
Replace CPU board.
9 beeps
FW system error This could be caused by a variety
of problems. The most likely
problems are bad RAM or faulty
CPU board.
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