Mitsubishi Electric MELSEC iQ-R Series User Manual page 369

If data sending/receiving for EtherNet/IP communications are not possible with the LINK LED for P2 turned off, check the
following items.
Check item
Is the STATUS LED lit in red or flashing in red?
Is the Ethernet cable connected correctly?
Are the parameter settings correct?
Are there any errors in the program?
If the above actions do not solve the problem, perform the module communication test to check for hardware failure. (
Page 371 Module Communication Test)
When the STATUS LED turns on in red or is flashing in red
When the STATUS LED turns on in red or is flashing in red, check the following.
Check item
Does any error occur in the module diagnostics?
■Error status determination
The error status can be determined as follows based on the lit/flashing status of the P2 STATUS LED.
P2 STATUS LED Error status
On in red Major error
Moderate error
Flashing in red Minor error
*1 When multiple errors occur, the error status is displayed in the order of major, moderate, and minor.
When the STATUS LED is flashing in green
When the P2 STATUS LED is flashing in green, check the following.
Check item
Have the following buffer memory values been
checked?
• 'Class1 communication status' (Un\G7734272 to
Un\G7734319)
• 'Class1 connection error status' (Un\G7734528 to
Un\G7735551)
Has communication start processing been
performed correctly with 'EtherNet/IP
communication start request' (Un\G7340096)?
Action
Take the actions displayed on the window. ( Page 368 Module Diagnostics)
Connect the Ethernet cable again.
Use a PING test to check the connection with the EtherNet/IP device. ( Page 385 PING test)
Correct the following details for the settings in the "EtherNet/IP Configuration" window.
• Model and name of the connected EtherNet/IP device
• IP address of the connected EtherNet/IP device
• Version of the registered EDS file
Check whether communications are started by 'EtherNet/IP communication start request'
(Un\G7340096). If not, correct the program.
Action
Take the actions displayed on the window. ( Page 368 Module Diagnostics)
*1
Description
An error such as hardware failure or memory failure. The module stops operating.
An error that causes the EtherNet/IP communication function to stop operating, due to a reason such as
a parameter error related to module operation
An error such as communication failure. The module continues operating.
Action
• Check whether the buffer memory values are normal.
• Take the action corresponding to the value of 'Class1 connection error status' (Un\G7734528 to
Un\G7735551). ( Page 435 Error Codes When a Connection Error Occurs)
• Check that a value other than 0 (start request) is set for ''EtherNet/IP communication start request'
(Un\G7340096).
• If 'EtherNet/IP communication continuation specification request' (Un\G7340104) is set to 16 (continue
EtherNet/IP communication), set 'EtherNet/IP communication start request' (Un\G7340096) to 0 (stop
request) and then to a value other than 0 (start request) again.
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