Ethernet Communication - Mitsubishi Electric Q26UD(E)HCPU User Manual

15.3.4

Ethernet communication

(1) Direct connection is not possible
If Ethernet communication is not possible through direct connection with the programming tool, check the
following items.
The CPU module is not directly connected to the
programming tool with a single cable.
The setting on the connected device (personal computer) is
incorrect.
• Ethernet port setting
• Firewall setting
• Communication setting of security software
In the Transfer Setup setting of the programming tool,
"Ethernet Port Direct Connection" is not selected for the PLC
side I/F PLC Module.
When parameters are read after switching to USB
connection, "Disable direct connection to MELSOFT" is
selected in the Built-in Ethernet port setting.
In "Status of Each Connection" of "Ethernet Diagnostics",
MELSOFT Direct Connection is set in forced deactivation
status.
In the "Error History" of "Ethernet Diagnostics", an error for
direct connection is detected.
Communication can be performed by increasing the value of
communication time check period or number of retries in the
detailed host station setting of "Transfer Setup"
The connected device (personal computer) does not support
the direct connection.
If Ethernet communication cannot be performed even after taking the above actions, the possible cause is a
hardware failure.
Please consult your local Mitsubishi representative.
*1 When two or more Ethernet ports are enabled in the network connections setting on the personal computer,
communication by direct connection is not possible. In the setting, leave only one Ethernet port enabled for direct
connection and disable other Ethernet ports.
Check item
CHAPTER 15 TROUBLESHOOTING
Corrective action
Directly connect the CPU module to the programming tool
*1
with a single cable.
Correct the setting on the connected device.
Correct the Transfer setup setting.
Correct the parameter.
Disable the forced deactivation.
Take corrective actions according to the error code.
• Adjust the value of communication time check period or
number of retries.
• Check the condition of the cables, connected device
(personal computer), and CPU module.
Connect a hub.
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