Daily Inspection - Mitsubishi Electric MELSEC QS SERIES User Manual

8
MAINTENANCE AND INSPECTION

8.1 Daily Inspection

Table8.1 lists the items that must be inspected daily.
Item Inspection item
Installation to DIN rail
Looseness and
instability of module
mounting screws
1
Looseness and
instability of 2-piece
terminal block
mounting screws
Adhesion of dirt or
foreign matter
Looseness of terminal
screws
2
Proximity of
solderless terminals
to each other
"POWER" LED
"RUN" LED
3
"SAFETY" LED
"ERR." LED
8
- 2 8.1 Daily Inspection
Table8.1 Daily inspection
Inspection
Check that the safety
The safety remote I/O
remote I/O module is
module must be stable.
stable.
Try to further tighten
screws with a screw Screws must not be loose.
driver.
Try to further tighten
screws with a screw Screws must not be loose.
driver.
Dirt and foreign matter must
Check visually.
not be present.
Try to further tighten
screws with a screw Screws must not be loose.
driver.
Solderless terminals must
Check visually. be positioned at proper
intervals.
The LED must be on
Check that the LED is
(green).
on.
(Abnormal if the LED is off.)
The LED must be on
Check that the LED is
(green).
momentarily on.
(Abnormal if the LED is off.)
The LED must be on
Check that the LED is
(green).
momentarily on.
(Abnormal if the LED is off.)
Check that the LED is The LED must be on (red).
momentarily on. (Abnormal if the LED is off.)
Judgment
Reinstall the safety
remote I/O module to
the DIN rail.
Retighten the module
mounting screws.
Retighten the 2-piece
terminal block
mounting screws.
Remove and clean.
Retighten the terminal
screws.
Correct.
Replace the module.
Remedy
Section 9.2.