Troubleshooting By Symptom - Mitsubishi Electric MELSEC iQ-R Series User Manual

5.5

Troubleshooting by Symptom

This section describes troubleshooting by symptom. If an error has occurred in the RJ71EIP91, identify the error cause using
the engineering tool. ( Page 112 Checking the Module Status)
Communications with EtherNet/IP devices cannot be performed
The following table lists the actions to be taken if communications with EtherNet/IP devices cannot be performed.
Check item
Is the RUN LED of the RJ71EIP91 off?
Is the Ethernet cable connected correctly?
Is the EtherNet/IP device compatible with the RJ71EIP91
communication functions (Class1 communications,
Class3 communications, and UCMM communications)?
Is the power supply of the EtherNet/IP device on?
Has an error occurred on the EtherNet/IP device,
switching hub, or a similar device?
Is the IP address setting of the EtherNet/IP device
correct?
Is the mode setting of the RJ71EIP91 a value other than
"Online"?
Has the initial processing completed successfully?
Has communication start processing been performed
correctly with 'EtherNet/IP communication start request'
(Y10)?
Has a timeout error occurred on the connection that
performs communications normally?
If the above actions do not solve the problem, perform the hardware test to check for hardware failure. ( Page 119
Hardware Test)
RJ71EIP91 cannot connect to EtherNet/IP Configuration Tool
The following table lists the actions to be taken if the RJ71EIP91 cannot connect to EtherNet/IP Configuration Tool.
Check item
Are the IP address settings for the RJ71EIP91 and the
personal computer to connect correct?
Is the RUN LED of the RJ71EIP91 off?
Can network diagnostics be performed?
( Page 114 Network diagnostics of EtherNet/IP
Configuration Tool)
If the above actions do not solve the problem, perform the hardware test to check for hardware failure. ( Page 119
Hardware Test)
5 TROUBLESHOOTING
120
5.5 Troubleshooting by Symptom
Action
If the RUN LED is off, reset the CPU module.
If resetting does not cause the RUN LED to turn on, a hardware failure may have occurred.
Replace the RJ71EIP91 and restart the connected EtherNet/IP device.
• Connect the Ethernet cable again.
• Use a PING test to check the connection with the EtherNet/IP device.
Check the specifications of the EtherNet/IP device.
Turn on the power supply of the EtherNet/IP device.
If an error has occurred on the EtherNet/IP device, switching hub, or a similar device, check the
manual of each device.
Use a PING test to check the connection with the EtherNet/IP device. ( Page 118 PING test)
Set the mode setting of the RJ71EIP91 to "Online" using the engineering tool. ( Page 44
Various Operations Settings)
Check whether communication is starting after 'Module Ready' (X0) and 'Communication Ready'
(X1F) turn on.
• 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.
Depending on the EtherNet/IP device used, the connection that performs communications normally
may be disconnected and a timeout error may occur after the time specified by Encapsulation
Inactivity Timeout has elapsed. Therefore, set Encapsulation Inactivity Timeout to 0 (invalid). (
Page 161 TCP/IP Interface)
Action
Set the IP addresses so that they have the same class and subnet address.
If the RUN LED is off, reset the CPU module.
If resetting does not cause the RUN LED to turn on, a hardware failure may have occurred.
Replace the RJ71EIP91 and restart the connected EtherNet/IP device.
Check that 'EtherNet/IP communication start request' (Y10) is on.