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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
9-3-4 Meaning of Error
Event name Previous Time Specified Event code 70010000 hex
Meaning A previous time was specified for output refreshing with a specified time stamp.
Source Depends on where the Support
Software is connected and the
system configuration.
Source details NX Unit Detection
timing
Continuously
Error
attributes
Level Observation Log category System
Recovery Reset error in the NX Unit.
Effects User program Continues. Operation The output value that is specified for the previous
time is not output.
Sys-
tem-defined
variables
Variable Data type Name
None --- ---
Cause and
correction
Assumed cause Correction Prevention
For the NX bus of CPU Units
A past time is specified due to an
error in the user program.
Correct the user program so that it
does not specify a past time.
Check in the user program to
make sure that it does not specify
a past time.
A Task Period Exceeded error
occurred in a CPU Unit.
Perform the required corrections
for the Task Period Exceeded
error that occurred in the CPU
Unit.
Take preventive measures against
the Task Period Exceeded error
that occurred in the CPU Unit.
For Communications Coupler Units
A past time is specified due to an
error in the user program.
Correct the user program so that it
does not specify a past time. If the
error persists even though the pro-
gram does not specify a past time,
change the specified time to a
later time.
Check in the user program to
make sure that it does not specify
a past time. If the error persists
even though the program does not
specify a past time, change the
specified time to a later time.
A Task Period Exceeded error
occurred in a CPU Unit.
Perform the required corrections
for the Task Period Exceeded
error that occurred in the CPU
Unit.
Take preventive measures against
the Task Period Exceeded error
that occurred in the CPU Unit.
The arrival of I/O data at an NX
Unit was delayed due to a Com-
munications Synchronization Error
or other communications error.
Refer to the corrections for the
Communications Synchronization
Error that occurred in a Communi-
cations Coupler Unit to prevent
the error.
Take preventive measures against
the Communications Synchroniza-
tion Error that occurred in the
Communications Coupler Unit.
Attached
information
None
Precautions/
Remarks
None
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