12 - 8
Table 12.2 Inverter Faults (continued)
Fault No. Name Contents Corrective Actions Error Code
Tuneup
incomplete
(magnetic
sensor meth-
od orienta-
tion)
Orientation command was input be-
fore tuning up (minor fault).
Perform orientation tuneup. Ffff
Magnetic sen-
sor signal
detection er-
ror
Incorrect magnetic sensor signal
voltage level during tuning up.
S Check the wiring of magnetic
sensor signal lines.
S Replace the magnetic sensor or
magnetizer.
Ffff
Fault of num-
ber of pulses
per rotation
(magnetic
sensor meth-
od orienta-
tion)
Number of motor pulses per main
axis rotation (4096 ÷ speed gear ra-
tio) exceeded ±6% during tuning
up.
S Check control constants C1-27,
28, 29.
S Check the wiring of motor en-
coder signal lines.
Ffff
Magnetic sen-
sor signal dis-
connection
Magnetic sensor signal cable was
disconnected or connected improp-
erly.
S Check the wiring of magnetic
sensor signal lines.
S Replace the magnetic sensor or
magnetizer.
S Perform tuneup again.
Ffff
INC signal er-
ror
(Magnetic
sensor meth-
od orienta-
tion)
INC signal input timing error
(minor fault)
After carrying out absolute posi-
tioning, change circuit to com-
mand INC signal.
Ffff
YENET1200
communica-
tion error
Communication error between YE-
NET1200 card and NC machine.
Check the wiring on communica-
tion line.
---
Excessive
position devi-
ation
Position deviation exceeded the al-
lowable range.
Check the main axis load. ---
YENET120 0
card ROM er-
ror
YENET1200 card memory (PROM)
error
Replace YENET1200 card. ---
YENET1200
communica-
tion WDT er-
ror 1
WDT error between YENET1200
card and NC machine.
Check the wiring on communica-
tion line.
---
YENET1200
communica-
tion WDT er-
ror 2
WDT error between YENET1200
card and control PCB.
Replace the control PCB. ---
YENET1200
card NMI
YENET1200 card detected NMI. Replace YENET1200 card. ---
YENET1200
card zero di-
vision
YENET1200 card detected division/
overflow error.
---
Communica-
tions timeout
1
Answer to communications com-
mand between YENET1200 card
and control PCB does not return.
Replace the controller PCB. ---
12
Troubleshooting
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