User manual
7–10
Chapter 7 – RUN Mode and Errors
LT Series User Manual
7.2.5 Cannot Execute Logic Program
7.2.6 Clock Settings Cannot be Entered
This problem occurs when the lithium backup battery’s voltage, used for the
internal clock, runs out. To enter the clock settings, please read the CLOCK
SETUP ERROR directions.
7.4.2 Error Messages - Detail
CLOCK SETUP ERROR
7.2.7 Error Screens
If the following error screen appears when you start the LT, it indicates an error
has occured and the LT is not set up correctly. Be sure to perfrom screen transfer
(Force System Setup) again.
Problem Reason Solution
Battery Problem Change the battery.
Memory Problem Change the memory unit.
Use LT Editor/C-Package to
restart the Control feature.
Refer to the LT Editor
Operation Manual – Logic
Program and Pro-Control
Editor Operation Manual
(included with the LT Editor
software).
When RUN/STOP switchover
is performed, the Hold CLEAR
feature is enabled.
Turn this feature OFF.
After changing to RUN mode,
control returns to STOP mode
Either a command perfomance
alarm error has occurred, or a
major error has occurred.
Debug the program.
Check the System variable
“#FaultCode.”
Retentive area of control
memory does not work
Program Error
This is a program data transfer
error. The data was not, but
should have been, transferred
from the data hold area to the
RUN area.