How To Check For Errors - Omron NX701-1620 User Manual

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How to Check for Errors

You can check to see if an error has occurred with the following methods.
Checking method
Checking the indicators
Checking with the troubleshooting function
of Sysmac Studio
Checking with the Troubleshooter of an
*2
HMI
Checking with instructions that read function
module error status
Checking with system-defined variables
*1 Detailed information such as error causes and corrections are not displayed.
*2 To perform troubleshooting from an HMI, connect the HMI to the built-in EtherNet/IP port on the CPU
Unit.
This section describes the above checking methods.
Checking the Indicators
You can use the PWR indicator on the Power Supply Unit and the RUN and ERROR indicators
on the CPU Unit to determine the event level for an error. The following table shows the
relationship between the Controller's indicators and the event level.
Indicator
PWR RUN
Not lit Not lit
Lit Not lit
Lit Flashing
Lit Not lit
Lit Not lit
Lit Lit
Lit Lit
Lit Lit
Lit Lit
Lit Not lit
Lit Flashing
*1 If you can go online with the CPU Unit from Sysmac Studio with a direct USB connection, the CPU
Unit is in PROGRAM mode. If you cannot go online, the CPU Unit is being reset.
*2 If you can go online with the CPU Unit from Sysmac Studio with a direct USB connection, a major fault
level error has occurred. If you cannot go online, a watchdog timer error has occurred in the CPU
*3
Unit.
*3 If you cannot go online with the CPU Unit from Sysmac Studio, it is also possible that the USB cable is
faulty or that the network type on Sysmac Studio is not set for a direct USB connection. Refer to the
NJ/NX-series Troubleshooting Manual (Cat. No. W503) if you cannot go online with the CPU Unit.
NJ/NX-series Database Connection CPU Units User's Manual (W527)
CPU Unit operating status
You can check for current Controller errors, a log of past Controller
errors, error sources, error causes, corrections, and error log of
CJ-series Special Units.
You can check for current Controller errors, a log of past Controller
errors, error sources, causes, and corrections.
You can check the highest-level status and highest-level event code
in the current Controller errors.
You can check the current Controller error status for each function
module.
CPU Unit operating status
ERROR
Not lit Power Supply Error
*1
Not lit CPU Unit Reset
Lit Incorrect Power Supply Unit
Connected
Lit CPU Unit Watchdog Timer Error
*2
Lit Major fault level
Flashing Partial fault level
Flashing Minor fault level
Not lit Observation
Not lit Normal operation in RUN mode
Not lit Normal operation in PROGRAM
*1
mode
Not lit Normal operation in startup state
7 Troubleshooting
What you can check
*1
Error confirmation with Sysmac
Studio or an HMI
Not possible:
Refer to the NJ/NX-series
Troubleshooting Manual (Cat. No.
W503).
*2
Possible:
Connect the Sysmac Studio or an HMI
and check the cause of and correction
for the error in the troubleshooting
functions of Sysmac Studio or the
Troubleshooter of an HMI.
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*3
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