Mitsubishi Melsec-Q Series User Manual page 351

(From previous page)
Are the data
specified for command format,
such as command type, device or
address correct?
YES
Were requests
from multiple devices
simultaneously sent to the MC protocol
port specified in Open
settings?
NO
Section 12.2.32
When Ethernet communication with the target device is not available
NO
Correct the command format referring to the following manual.
MELSEC Communication Protocol Reference Manual
NO
Perform the following.
YES
Disable simultaneous request
transmissions from multiple devices.
Set a different MC protocol port for
each target.
NO
CHAPTER12 TROUBLESHOOTING
Was the error resolved?
Was the error resolved?
YES
YES
Completed
12 - 56
1
2
3
12
5
6
7
8