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5 TROUBLESHOOTING
5.3 Checking the Network Status
PING test
A PING test is used to check that an EtherNet/IP device exists on the same EtherNet/IP network.
The RJ71EIP91 sends a packet to the EtherNet/IP device to check its existence (an echo request). Then, the RJ71EIP91
checks whether communication is possible by seeing whether a response (an echo response) is returned.
Check method
The following methods are available for checking the PING test.
■Checking from EtherNet/IP Configuration Tool
Use EtherNet/IP Configuration Tool to execute a PING test.
For details, refer to the following.
Page 65 [Ping] tab
Page 76 [General] tab
■Checking from the buffer memory
Execute a PING test by operating a program that uses the buffer memory.
For the program example of PING tests, refer to the following.
Page 105 Program Example of PING Test
Error details
When the buffer memory is used to execute a PING test, the result of the PING test can be checked from 'Result'
(Un\G27908).
The following table lists the details when an error occurs.
(1) Echo request
(2) Echo response
'Result' (Un\G27908) Error details and causes Action
C0DBH The target IP address is incorrect. • Set the IP address within the range between 1.0.0.1
and 126.255.255.255 or 128.0.0.0 and
223.255.255.254.
• The IP address of the own node cannot be set. Set the
IP address of the external device.
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