
2
01.05.24
43/41
Descri
tion
Design.
DateEd
01.03.23
SHEET
DRAW. No.
CUST.
TITLE
okota
okota
Newly designed
i series Spindle
Start-up Procedure
-53866E-387/02
FANUC LTD
1
CNC monitor display
0 15 15i 16i/16
SPM
Display
(alarm
code)
Alarm description
Troubleshooting
(Described parameter No.16i/16)
409 OT399 SP0046 7n46 46 One-rotation signal
detection error during
thread cutting
1. Check and correct parameters.
2. Change feedback cables.
3. Change position detector.
409 OT399 SP0047 7n47 47 Position coder signal
abnormal
1. Change Feedback cables.
2. Change position coder.
409 OT399 SP0050 7n50 50 Excessive speed
command calculation
value during spindle
synchronization
Check and correct parameter setting of
gear ratio and position gain
409 OT399 SP0051 7n51 51 DC link undervoltage. 1. Check and correct power supply
voltage.
2. Change the magnetic contactor.
409 OT399 SP0052 7n52 52 ITP signal abnormal 1 1. Change SPM control printed circuit
board.
2. Change spindle interface printed
circuit board for CNC side.
409 OT399 SP0053 7n53 53 ITP signal abnormal 2 1. Change SPM control printed circuit
board.
2. Change spindle interface printed
circuit board for CNC side.
409 OT399 SP0054 7n54 54 Overload current alarm Reconsider load condition.
409 OT399 SP0055 7n55 55 Power line state abnormal 1. Change the magnetic contactor.
2. Check and correct sequence.
409 OT399 SP0056 7n56 56 Internal control circuit
cooling fan stop.
Change SPM internal control circuit
cooling fan.
409 OT399 SP0057 7n57 57 Excessive regenerated
power
Reduce acceleration/deceleration duty.
409 OT399 SP0058 7n58 58 Converter main circuit
overload
1. Confirm cooling condition of PSM.
2. Change PSM.
409 OT399 SP0059 7n59 59 Converter internal
cooling fan stop.
Change PSM internal cooling fan.
409 OT399 SP0062 7n62 62 Motor velocity command
overflow
Check and correct parameters
(No.4021, 4056 to 4059)
409 OT399 SP0066 7n66 66 Communication alarm
between SPM’s
1. Change cables.
2. Check and correct connection.