Maintenance And Troubleshooting; Maintenance; Replacing The Battery - Mitsubishi MELSEC F FX-40DU-E Handy Manual

9.
MAINTENANCE & TROUBLESHOOTING
This chapter covers maintenance procedures such as replacing the battery and the EPROM, and the
troubleshooting to perform when faults and errors occur.
The FX-40DU-E does not contain any consumable parts which are considered to have a short life.
However, the life of the battery is about
5
years, that of the liquid crystal display about 50,000 hours,
and that of the back-light about 10,000 hours; you are recommended to replace these items at regular
intervals in accordance with the following directions.
In addition, attention should be paid to the following points when inspecting the FX-40DU-E and
associated equipment.
Check for abnormally high temperatures inside the operation panel due to proximity to other heat
radiating bodies or exposure to direct sunlight.
Check for dust or conductive dust inside the panel.
Check for looseness in wiring and terminal fittings
9.1 .I
Replacing the battery
When the battery voltage gets low,
b6
of the control devices (bit devices), set using the screen creation
software, comes ON. It is advisable to arrange for a lamp to be switched on by an output from the
programmable controller so that the battery status can be monitored.
Control device
Programmable controller
external indication
The battery is still effective for about
1
month after the control bit (b6) comes ON, but if the FX-40DU-E
is used while b6 is ON, the power should be switched on as much as possible and the battery should
be changed as soon as possible.
If the screen data is stored in the EPROM, it will not be lost even if there is no battery power.
,
Connector
1
(1)
Switch the FX-40DU-E power off.
(2)
Open the door of the panel marked USER at the rear of the
Battery changing
operation
FX-40DU-E.
( 3 1 Remove the old batterv from its holder and disconnect the
~,
connector.
(4)
Connect the connector of the new battery within 30 seconds.
(5)
Insert the battery into the holder and close the panel door.
F2-40BL
lithium battery