Panasonic FP7 User Manual page 187

 Error code
Code Name
Double word
U1
access error
U26 System error
Positioning
U44
Error
Unit
U45 processing
error
(Note 1): On the unit ver.1.1 or later, the address where the double word access error occurs can be confirmed in the
UM00063. When no error occurs or the error is cleared, "FFFF" is stored.
REFERENCE
• For details of the access units of unit memories, refer to "13.3.1 Role of Unit
Memories" and "13.3.2 List of Unit Memories （AFP7MXY32DWD/
AFP7MXY32DWDH）".
• For details of the solution when the positioning error (warning code 44)
occurs, refer to "12.2.2 What to Do When Positioning Error Occurs
 Clearing errors using user programs
• Errors can be cleared by user programs.
• Executing the dedicated instruction UCLR (error) clears errors occurred in the multi I/O unit.
Example) Program to clear errors in the multi I/O unit installed in the slot No.1
R100
DF
（ ）
Unit clear
request
Code
Situation storage
destination
The access by one
word (read, write)
was executed to an
UM00064
area to which only
the access by two
words is allowed.
There is a
possibility that an
UM00066
error occurred in
the main unit.
The setting error for
UM00066
positioning occurs.
A table number is
out of the range at
the time of
positioning table
UM00066
start/positioning
simultaneous start.
(The table number
is larger than 20.)
12.2 Troubleshooting
Solution
Check the unit memory (UM00063) for
confirming the address where the error
occurs. (Note 1)
Correct the operation unit of the
instruction in the user program to
access the address where the error
occurs by two words.
Reboot the unit. If the alarm still occurs,
consult your Panasonic representative.
Refer to "12.2.2 What to Do When
Positioning Error Occurs".
Check and correct the program.
UCLR U1
Slot no.
".
12-5