Mitsubishi Electric FX3U-ENET-ADP - Errors in Communication Using MC Protocol

9 Troubleshooting
9.4 Troubleshooting Flowchart
127
FX3U-ENET-ADP User's Manual
1
Introduction
2
Specification
3
System Configuration
4
Installation
5
Wiring
6
Introduction of Functions
7
Communication Using MC Protocol
8
The Operation of GX Works2
9
Troubleshooting
A
List of Special Devices
9.4.1 Errors in communication using MC protocol
Communication error
Check the open status of the
connection with the external device.
[OPEN] LED lit?
NO
YES
NO
YES
Send the command to the Ethernet
adapter.
Was a response
returned to the device that sent
the command?
NO
YES
YES
1)
Perform open setting.
(For details, refer to Section 6.11
and Section 9.2.)
Is the IP address
designation of the command
correct?
NO
YES
Correct the IP address and send
the command again.
NO
YES
Match the communication protocol
(TCP/UDP) with the external device.
(For details, refer to Section 6.11.)
Is the end code of
the response "0"?
NO
Fix the faulty part according to
the description of the end and
abnormal codes (Refer to Section 10.3).
Does the
communication protocol
(TCP/UDP) match with that of the
external device?
The command may not be sent to the
Ethernet
adapter from the external
device on the command sending
side. Check the sending side.
Was a command sent
from the external device?