Communications Using The Built-In Ethernet Port Are Slow; When The File Transfer Function (Ftp Client) Is Used - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Communications using the built-in Ethernet port are slow.

When communications using the built-in Ethernet port are slow, check the following items and take action.
Check item
Is the communication request load from the external device high?
Is the communication request load from the CPU module high?

When the file transfer function (FTP client) is used

When the CPU module cannot access to the external device (FTP server), check the following item and take action.
Check item
Is a value other than 0000H stored in the completion status of the file send
instruction and file get instruction?
Action
Check the buffer memory Un\G100 (receive packet count (current) per unit
time (one second)) of the CPU module (built-in Ethernet port part), and if the
value is significantly large compared to the normal communications, the
following actions may improve the processing speed.
• Review the communication request from the engineering tool and GOT.
• Review the communication request from the transfer destination (execution
source) of the simple CPU communications.
• Review the file transfer function (FTP server).
• Review the communications using the SLMP.
Check the buffer memory Un\G100 (receive packet count (current) per unit
time (one second)) of the CPU module (built-in Ethernet port part), and if the
value is significantly large compared to the normal communications, the
following actions may improve the processing speed.
• Review the execution frequency of the instructions for the built-in Ethernet
function (socket communications instruction/predefined protocol support
function instruction/SLMP frame send instruction/file transfer function
instruction)
• Review the settings (such as the number of points) of CC-Link IE Field
Network Basic.
• Review the settings (such as the execution interval and the number of
points) of the simple CPU communications.
• Review the settings (such as automatic detection and backup execution) of
iQSS (built-in Ethernet).
• Review the settings (such as the number of executions) of data logging file
transfer.
Action
Take action of the completion status stored by the file transfer function
instructions and execute the instructions again.
3.4 Troubleshooting by Symptom
3 TROUBLESHOOTING
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