10 Troubleshooting
10 - 8
NX-series Position Interface Units User’s Manual (W524)
743E0000 hex Illegal Fol-
lowing Error
The difference
between the com-
mand position and
actual position
exceeds the range
expressed by 29
bits.
• A command that
exceeded the maximum
velocity (500 kpps) was
output continuously, so
the following error for the
actual output, which is
restricted by the maxi-
mum velocity, has
increased.
• A command velocity that
does not correspond to
the command position
was specified when a
velocity-continuous
pulse output was used,
so the number of pulses
that were actually output
for the updated com-
mand position has
increased.
SP. 10-16
743F0000 hex Illegal State
Transition
The EtherCAT
master or Ether-
CAT Coupler Unit
executed a com-
mand to change
the communica-
tions status when
the Pulse Output
Unit is in the Oper-
ation Enabled sta-
tus.
• A communications com-
mand to change the cur-
rent communications
status was received from
the communications
master while the Unit is
in the Operation Enabled
status.
SP. 10-17
80200000 hex NX Unit I/O
Communica-
tions Error
A communica-
tions error
occurred between
the Communica-
tions Coupler Unit
and the NX Unit.
• The NX Unit is not
mounted properly.
• The power cable for the
Unit power supply is dis-
connected. Or, the wiring
from the Unit power sup-
ply to the NX Units is
incorrect.
• The power cable for the
Unit power supply is bro-
ken.
• The voltage of the Unit
power supply is outside
the specified range. Or,
the capacity of the Unit
power supply is insuffi-
cient.
• There is a hardware
error in the NX Unit.
SP. 10-18
80210000 hex NX Unit Out-
put Synchro-
nization
Error
An output syn-
chronization error
occurred in the NX
Unit.
• The communications
cable connected to the
Communications Cou-
pler Unit is broken or the
connection is faulty.
•Noise
SP. 10-19
Event code Event name Meaning Assumed cause
Level
Refer-
ence
Maj Prt Min Obs Info
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