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MELSEC
14 TROUBLESHOOTING
14.5 Flowchart to Use when Error Occurred During Data Link
The following explains corrective actions when an error occurred during data link.
14.5.1 Flowchart to use when unexpected value is input to specific link device
Check the following items.
(1) Check for a station with link error using the each station status screen.
(2) Check the parameter assignment range at the control station.
(3) Check the device range used in the programmable controller program at the
programmable controller.
(4) Check, in the user program, argument data for the Data Link function accessing
the specific link device.
14.5.2 Flowchart to use when data cannot be written or read in user program
YES
NO
YES
NO
YES
NO
YES
NO
START
Is the communication
function's return value
abnormal?
Check the error with the error code table.
Refer to MELSEC Data Link Library
Reference Manual.
Check the error with the error code table.
Refer to MELSEC Data Link Library
Reference Manual.
Monitor the device to be accessed from
the device monitor utility.
Also, perform a data change to see
if data can be written.
Can the device be monitored?
(Was the data written?)
Check the user program.
Did an error occur?
Was it host access?
Check the MELSECNET/H board is
overlapping with the system and other
boards.
Check according to the flowcharts in
Section 14.4.
Summary of Contents for Q80BD-J71BR11
Page 2: ......
Page 24: ...A 22 A 22 MEMO ...
Page 50: ...4 6 4 6 MELSEC 4 FUNCTION MEMO ...
Page 92: ...6 36 6 36 MELSEC 6 PROCEDURE AND SETTINGS UP TO THE POINT OF OPERATION MEMO ...
Page 132: ...10 2 10 2 MELSEC 10 MELSEC DATA LINK LIBRARY MEMO 10 ...
Page 138: ...11 6 11 6 MELSEC 11 PROGRAMMING MEMO ...
Page 164: ...12 26 12 26 MELSEC 12 APPLICATION FUNCTIONS MEMO ...
Page 166: ...13 2 13 2 MELSEC 13 ERROR CODE MEMO 13 ...
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