Mitsubishi Electric Melsec Q Series User Manual page 387

10
TROUBLESHOOTING
(2) Troubleshooting about network connection
Symptom
Unable to access the MES interface
module.
(3) Troubleshooting about communication between the MES interface module
Table 10.20 Troubleshooting about communication between the MES interface module and access target CPU
Symptom
Unable to access another station via Q
series E71.
An error occurs when accessing the
Redundant CPU.
When the MES interface module is started
up, 'Errors detected by the access target
CPU' (error code: 4B00h) occurs.
Table 10.19 Troubleshooting about network connection
Checked item
Is it in "Online" mode?
Is the MES interface module connected to
the network? (X4 = ON)
Is there any disconnection in the
connection route?
Is the IP address duplicated?
Is there a firewall and/or a proxy server in
the connection route?
Is there any problem on the personal
computer?
and access target CPU
Checked item
Is a remote password set for the GX
Developer communication port (UDP/IP) of
the Q series E71 on the target or relay
station?
Is MES interface accessing the Redundant
CPU of other station?
Is system switching consecutively
occurring?
Is the MES interface module accessing
other CPU, or accessing the other station
via a network module controlled by other
CPU, in the multiple CPU module?
10.3.3 When operating the MES interface module
Corrective action
• Change the mode to "Online".
• Connect the MES interface module to the
network.
• Connect the cables properly.
• Correct the IP address setting.
Section 7.6.1 Setting items in
Network setting
• Ask your network administrator about the
firewall setting.
Section 5.1 Installation
• Ask your network administrator about the
proxy server setting.
• Replace it with another computer.
Corrective action
• Remove the remote password set for the
GX Developer communication port (UDP/
IP) of the Q series E71 on the target or
relay station.
• Mount a MES interface module to the
extension base unit of the Redundant
CPU that is access target and access it.
The MES interface cannot access the
Redundant CPU of other station.
• Review the system so that system
switching will not occur consecutively.
• Clear the error in the MES interface
module after starting up the CPU module
in the multiple CPU system.
Section 2.6.2 Precautions for using
multiple CPU system
10.3 Troubleshooting by symptom
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