Mitsubishi Electric MELSEC iQ-RJ71EIP91 - Checking the Module Status

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5 TROUBLESHOOTING
5.1 Checking with LEDs
5 TROUBLESHOOTING
This chapter describes troubleshooting of the RJ71EIP91.
5.1 Checking with LEDs
This section describes troubleshooting using the LEDs.
The error status can be determined by the status of the RUN LED, ERR LED, and MS LED.
*1 When multiple errors occur, the error status is displayed in the order of major, moderate, and minor.
When the RUN LED turns off
When the RUN LED turns off after the RJ71EIP91 is powered on, check the following.
If the above actions do not solve the problem, perform the hardware test to check for RJ71EIP91 failure. ( Page 119
Hardware Test)
When the ERR LED turns on or is flashing
When the ERR LED turns on or is flashing, check the following.
When the MS LED turns on in red or is flashing in red
When the MS LED turns on in red or is flashing in red, check the following.
When the NS LED is flashing in green
When the NS LED is flashing in green, check the following.
RUN LED ERR LED MS LED Error status
*1
Description
Off On, flashing On in red Major error An error such as hardware failure or memory failure. The module stops operating.
On Flashing On in red Moderate error An error such as system bus failure. The module stops operating.
On On Flashing in
red
Minor error An error such as communication failure. The module continues operating.
Check item Action
Is the RJ71EIP91 mounted correctly? Securely mount the RJ71EIP91 on the base unit.
Is the system powered off and on or the CPU module reset while parameters
are written?
Power off and on the system or reset the CPU module and start the
RJ71EIP91.
After that, write the parameters again.
Check item Action
Does any error occur in the module diagnostics? Take the actions displayed in the module diagnostics. ( Page 112
Checking the Module Status)
Check item Action
Does any error occur in the module diagnostics? Take the actions displayed in the module diagnostics. ( Page 112
Checking the Module Status)
Check item Action
Have the following buffer memory values been checked?
• 'Class1 communication status' (Un\G27136 to Un\G27183)
• 'Class1 Connection Behavior Error status' (Un\G27392 to Un\G27647)
• Check whether the buffer memory values are normal.
• Take the action corresponding to the value of 'Class1 Connection Behavior
Error status' (Un\G27392 to Un\G27647). ( Page 151 Class1
Connection Behavior Error status (Un\G27392 to Un\G27647))
Has communication start processing been performed correctly with 'EtherNet/
IP communication start request' (Y10)?
• Check that 'EtherNet/IP communication start request' (Y10) is on.
• If 'EtherNet/IP data link continuation specification request' (Un\G16634) is
set to 16 (continue EtherNet/IP communication), turn 'EtherNet/IP
communication start request' (Y10) on again.