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MELSEC-Q
8 TROUBLESHOOTING
2) Error and Solution, Intelligent Module Information
• Error and Solution
The error detail and corrective action for the error currently selected
under "Error History List" are displayed.
• Intelligent Module Information
The error description and corrective action for the error, which is
currently selected under "Error History List", are displayed.
1
1: When the error that simultaneously occurs with a network error is selected, the
status right before the error occurrence may be displayed under Intelligent
Module Information.
For the master module, the following will be displayed.
Item Description
Baton pass status (host) (SW0047) Baton pass status of the host station
Cause of data link stop (SW0049) A cause of data link stop of the host station
Baton pass status of each station (SW0070 to
SW0073)
Baton pass status of each station
0: Normal
1: Abnormal
Loopback station (forward loop side) (SW0099) Station number of which station is performing a loopback in the
forward loop.
For the remote master station, [7D
H] is displayed.
Loopback station (reverse loop side) (SW009A) Station number of which station is performing a loopback in the
reverse loop.
For the remote master station, [7D
H] is displayed.
Cyclic transmission status of each station
(SW0074 to SW0077)
Cyclic transmission status of each station
0: Executing cyclic transmission
1: Cyclic transmission not executed
Dedicated instruction Dedicated instruction on which an error has occurred
Target network number Network number of a station to which a dedicated instruction was
executed, resulted in an error
Target station number Station number of a station to which a dedicated instruction was
executed, resulting in an error
3) Create CSV File button
Click this button to output the module error history in a CSV file.
POINT
(1) If errors frequently occur in the master module, "*HST.LOSS*" may be
displayed instead of error codes in the Error Code column.
(Example)
If too many "*HST.LOSS*" are displayed, increase the number of errors to be
collected per scan in the "PLC RAS" tab of the "Q Parameter Setting" dialog
box. For setting, refer to the user's manual (Function Explanation, Program
Example) of the CPU module used.
(2) When the same errors consecutively have occurred, only the error code for the
first error is displayed on the "Error History" screen.