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9 Troubleshooting
NX-series Digital I/O Unit User’s Manual (W521)
9-3 Checking for Errors and Troubleshooting on the Support Software
9
9-3-3 Event Codes and Corrections for Errors
80240000 hex NX Unit
Clock Not
Synchro-
nized Error
A time information
error occurred in an
NX Unit.
For the NX bus of CPU Units
• There is a hardware error in an
NX Unit.
• There is a hardware error in a
CPU Unit.
For Communications Coupler
Units
• There is a hardware error in an
NX Unit.
• There is a hardware error in an
EtherCAT Coupler Unit.
√ P. 9-16
70010000 hex Previous
Time Speci-
fied
A previous time
was specified for
output refreshing
with a specified
time stamp.
For the NX bus of CPU Units
• A past time is specified due to
an error in the user program.
• A Task Period Exceeded error
occurred in a CPU Unit.
For Communications Coupler
Units
• A past time is specified due to
an error in the user program.
• A Task Period Exceeded error
occurred in a CPU Unit.
• The arrival of I/O data at an NX
Unit was delayed due to a
Communications Synchroniza-
tion Error or other communica-
tions error.
√ P. 9-17
90400000 hex Event Log
Cleared
The event log was
cleared.
• The event log was cleared by
the user.
√ P. 9-18
Event code Event name Meaning Assumed cause
Level
Reference
Maj Prt Min Obs Info
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