
7. TROUBLESHOOTING
B–63325EN/03
414
This system alarm occurs when an I/O Link link is released. Identify the
cause of the alarm, referring to xx:yy displayed on the screen.
Example) If NMI SLC 43:42 is displayed,
xx = 43 (hex), bit 0 of xx (written as xx#0 in the remainder of this
manual) = 1, xx#1 = 1, xx#6 = 1
yy = 42 (hex), yy#6 = yy#6 = 1
First, identify the cause by referring to Section 7.5.2 since xx#0 = 1.
This indicates that the NC detected invalid communication data. The
most likely causes are:
(1)Electrical noise
→ Refer to “FANUC I/O Link Connection” in the “FANUC Series 15i
Connection Manual (Hardware)” (B–63323EN) for information on
ground connection and measures against noise.
(2)Vibration
→ Check that the I/O Link cables are connected securely.
Refer to “FANUC I/O Link Connection” in the “FANUC Series 15i
Connection Manual (Hardware)” (B–63323EN) for information on
the requirements for installing each slave station.
(3)Defective hardware component
→ The most likely causes are a defective CNC, slave station, or cable.
Replace these components, starting with whichever is one easiest
to replace, to identify the defective component.
NOTE
If this alarm occurs intermittently, making it difficult to identify
the defective hardware component, check PMC address
R9051. If R9051 increments relatively frequently, check
whether incrementing stops after replacing each hardware
component. If incrementing stops, the corresponding
hardware component may be defective.
7.17.2
Occurrence of System
Alarm PC050 NMI SLC
xx:yy
7.17.2.1
If “xx#0=1” in NMI SLC
xx:yy