Troubleshooting; Error Codes - Mitsubishi Electric MELSEC-Q Series User Manual

8 TROUBLESHOOTING

8 TROUBLESHOOTING

8.1 Error Codes

The error has the following three types.
• Write data error (
• AT error completion (001E
• Hardware error (001F
*1
The error codes of the Q62HLC are stored into the buffer memory address 0.
Display them in hexadecimal for check.
(1) Error code to be stored when multiple errors occur
8 - 1
3 ,
H
, 002E
H
, 002F
H
The buffer memory address occurring write data error is displayed at
hexadecimal.
Example) 0234 expresses that data out of the range are written to Proportional
H
band (P) setting (buffer memory address: 35 (23
(a) If higher priority error occurs during occurrence of lower priority error, the
error code of the higher one is overwritten.
High Hardware error
(b) If multiple errors have been detected at hardware error/AT error completion,
the error code of the first occurred error is retained.
(c) In write data error, if higher priority error occurs during occurrence of lower
priority error, the error code of the higher one is overwritten.
High 6
If the last one digit of the error codes is the same, the smallest buffer
memory address among the ones where data were mistakenly written is
stored by priority.
However, if the error code is
data were mistakenly written first is held.
[Example of priority order of error code to be stored]
High 0A46
H
*1
4 , 5 , 6 )
H H H
, 003E , 004E , 005E
H H H
, 003F )
H H
[Priority order]
AT error completion
[Priority order]
3 5
H H H
6 , the buffer memory address where
H
0203 0403 0575
H H H
"0A46 " is held even when "0346
H
MELSEC-Q
)
H
in
)).
H
Write data error Low
4 Low
H
0334 Low
H
" occurs.
H
8 - 1
8