4 TROUBLESHOOTING
4.1 Checking with LED
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4 TROUBLESHOOTING
This chapter describes troubleshooting of CC-Link IE Field Network.
4.1 Checking with LED
This section describes troubleshooting using LED.
Error status can be determined by status of the RUN LED and the ERR LED.
*1 When multiple errors occur, the error status is displayed in the order of major, moderate, and minor.
For the RJ71EN71 or RnENCPU, whether the error occurs in the P1 or P2 can be checked with P ERR LED.
When the RUN LED turns off
When the RUN LED turns off after powering on the master/local module, check the following.
If the above action does not solve the problem, perform the module communication test to check for hardware failure. (
Page 221 Module communication test)
When the ERR LED turns on or is flashing
When the ERR LED turns on or is flashing, check the following.
If the above actions do not solve the problem, perform the following tests to check for an error.
• Module communication test ( Page 221 Module communication test)
• Cable test ( Page 239 Cable Test)
RUN LED ERR LED Error status
*1
Description
Off On, flashing Major error An error such as hardware failure or memory failure. The module stops operating.
On Flashing Moderate error An error, such as parameter error, which affect module operation. The module stops
operating.
On On Minor error An error such as communication failure. The module continues operating.
Check item Action
Is the master/local module mounted correctly? Securely mount the master/local module on the base unit.
Check item Action
Does any error occur in the module diagnostics? Take the actions displayed on the window.
Is the disconnected station displayed in the CC-Link IE Field Network
diagnostics?
• Correct "Network Configuration Settings" in "Basic Settings" of the master
station in accordance with the slave station actually connected.
• Perform troubleshooting for when the D LINK LED turns off or is flashing.
( Page 216 When the D LINK LED turns off or is flashing)
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