Troubleshooting; Err Led Turns On On The Unit - Panasonic FP7 User Manual

12.2 Troubleshooting

12.2 Troubleshooting

12.2.1 ERR LED Turns ON on the Unit

■
Situation
An alarm or error occurred.
■
Solution
Check the condition according to the following procedure.
1.
Select Online>Device Monitor in FPWIN GR7.
2.
Monitor the unit memory (UM00064 or UM00066) in which an error code is stored, and
check the alarm/error code.
3.
For code 44, monitor the unit memory (UM00207) in which a positioning error code is
stored and check the detailed information. For detailed information on positioning errors,
refer to the list of positioning error codes on page "P.12-5".
4.
Check the appropriate way to handle for each error code, switch the mode to PROG. mode
and review the settings or program. (When code 20 or 26 occurs, the unit must be
rebooted.)
5.
Execute the UCLR command to clear the error. In the case of alarm (code: U20) or error
(code: 26), turn on the power supply again.
6.
Switch the mode to RUN mode. Once the ERR.LED turns off, the error state will be cleared.
If the LED does not turn off, repeat the above operation.
■
Alarm code
Code Name
Unit alarm
U20
(H type only)
■
Error code
Code Name
Double word
U1
access error
U26 System error
12-4
Situation Code storage
destination
There is a possibility
that an error
UM00064
occurred in the main
unit.
Situation Code 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 error
UM00066
occurred in the main
unit.
Solution
Reboot the unit. If the alarm still occurs,
consult your Panasonic representative.
Solution
Check the unit memory (UM00063) to
confirm the address where the error
(Note 1)
occurred.
Correct the operation unit of the
instruction in the user program, so that it
accesses the address where the error
occurred using a two-word unit.
Reboot the unit. If the alarm still occurs,
consult your Panasonic representative.
WUME-FP7MXY-06