1-15
1 Overview of Errors
NJ-series Troubleshooting Manual (W503)
1-3 Non-fatal Errors
1
1-3-3 Resetting Non-fatal Errors
Always confirm safety at the connected equipment before you reset Controller errors for a CJ-
series Special Unit. When the Controller error is reset, the Unit where the Controller error with an
event level of observation or higher will be restarted. Before you reset all errors, confirm that no
Controller errors with an event level of observation or higher have occurred for the CJ-series
Special Unit. Observation level events do not appear on the Controller Error Tab Page, so it is
possible that you may restart the CJ-series Special Unit without intending to do so. You can
check the status of the _CJB_UnitErrSta[0,0] to _CJB_UnitErrSta[3,9] Error Status variables on
a Watch Tab Page to see if an observation level Controller error has occurred.
Precautions for Correct UsePrecautions for Correct Use
Resetting an error is not the same as eliminating the cause of the error. Always eliminate the
cause of an error before you perform the procedure to reset the error.
Error Resetting Methods
Method Operation
Errors that are
reset
Description
Commands from
Sysmac Studio
Resetting Controller
errors
Resetting all errors
in the entire Control-
ler
Reset the Controller errors from the Sys-
mac Studio’s Troubleshooting Dialog Box.
Resetting all Slave
Terminal errors
Refer to the manual for the Communica-
tions Coupler Unit for details on resetting
errors in a Slave Terminal.
Resetting errors for
individually speci-
fied NX Units
Downloading Resetting all errors
for a specific func-
tion module
After the causes of the Controller errors are
removed, all Controller errors in the relevant
function module are reset as a result. Errors
are not reset when you download the Con-
troller Configurations and Setup.
Clear All Memory Resetting all errors
for all function mod-
ules
After the causes of the Controller errors are
removed, all Controller errors in all function
modules are reset as a result. Errors for
Slave Terminals are not reset.
*1
Controller reset After the causes of the Controller errors are
removed, all Controller errors in all function
modules are reset as a result. Errors for
Slave Terminals are not reset.
*1
Clear All Memory
operation for Slave
Ter m in al
Resetting all Slave
Terminal errors
If the causes for the Controller errors are
removed, all Controller errors in the Slave
Terminals are reset.
Restarting the Slave
Ter m in al
Commands from an
NS-series PT
*2
Resetting Controller
errors
Resetting all errors
in the entire Control-
ler
Reset Controller errors from the Trouble-
shooter of an NS-series PT that is compati-
ble with NJ-series Controllers.
You can reset errors from a PT that is not
directly compatible with the NJ-series Con-
troller or another company’s HMI if you use
the PT/HMI in combination with the reset
error instruction for the function module in
the user program.
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