Omron NX-SL3500

Event code Event name Meaning Assumed cause
Level
Reference
M
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M
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80200000 hex NX Unit I/O
Communica-
tions Error
An I/O communica-
tions error occurred
between the NX bus
master and the NX
Unit.
• The NX Unit is not mounted
properly
.
• The power cable for the Unit
power supply is disconnected.
Or
, the wiring from the Unit
power supply to the NX Units
is incorrect.
• The power cable for the Unit
power supply is broken.
• The unit power voltage is out
of the supported range, or the
unit power capacity is not suffi-
cient.
• There is a hardware error in
the NX Unit.
¡
page
12 - 73
80300000 hex Safety Proc-
ess Data
Communica-
tions Time-
out
A communications
timeout occurred in
safety process data
communications with
the Safety Control
Unit.
• A setting is not correct. The
setting of the safety task peri-
od is too short.
• There is excessive noise.
• The Safety CPU Unit or safety
slave entered a status where it
could not continue safety proc-
ess data communications.
• The process data communica-
tions were not performed cor-
rectly because an error or sta-
tus change occurred in the NX
bus master to which the Unit is
connected.
¡
page
12 - 75
84F10000 hex
NX Bus I/O
Communica-
tions Stop-
ped
An error occurred in
I/O communications
between the NX bus
master and an NX
Unit.
There is a hardware error in the
NX bus master or an NX Unit.
¡
page
12 - 76
l
Safety I/O Errors
Event code Event name Meaning Assumed cause
Level
Reference
M
a
j
P
rt
M
i
n
O
b
s
I
n
f
o
05210000 hex Internal Cir-
cuit Error at
Safety Input
A fault was detected
in the internal circuit
for the safety input
terminal.
• The internal circuit for the safe-
ty input terminal is faulty
.
• A memory error or signal error
occurred due to a transient
cause, such as an excessive
noise.
¡
page
12 - 77
12 Troubleshooting
12 - 28
NX-series Safety Control Unit User's Manual (Z930)