Instruction manual

6 - 5
6 INSPECTION AND MAINTENANCE
6.3 Periodic Inspection
The items that must be inspected one or two times every 6 months to 1 year are listed
below. When the equipment is moved or modified, or layout of the wiring is changed,
also implement this inspection.
Table 6.2 Periodic Inspection
Item Inspection item Inspection Criterion Action
1
Ambient environment
Ambient temperature
Measure with a thermometer and
a hygrometer.
Measure corrosive gas.
0 to 55 °C (32 to 131 °F)
When the controller is used in
the board, the ambient
temperature in the board
becomes the ambient
temperature.
Ambient humidity 5 to 95 % RH
Atmosphere No corrosive gases
2 Power voltage
Measure a voltage across the
terminals of 100/200VAC and
24VDC.
85 to 132VAC
Change the power supply.
170 to 264VAC
15.6 to 31.2VDC
3
Installation
Looseness, rattling
Move the module to check for
looseness and rattling.
The module must be installed
solidly.
Retighten the screws.
If the CPU modules, Motion
modules, I/O modules, or
power supply modules are
loose, fix it with screws.
Adhesion of dirt and
foreign matter
Check visually.
Dirt and foreign matter must not
be present.
Remove and clean.
4
Connection
Looseness of terminal
screws
Try to further tighten screws with a
screwdriver.
Screws must not be loose. Retighten the terminal screws.
Proximity of solderless
terminals to each other
Check visually.
Solderless terminals must be
positioned at proper intervals.
Correct.
Looseness of
connectors
Check visually. Connectors must not be loose.
Retighten the connector fixing
screws.
5 Battery
Check the 7-segment LED at the
front side of CPU module.
Must be turned OFF "BT1" or
"BT2" display.
Even if the lowering of a
battery capacity is not shown,
replace the battery with a new
one if a service life time of the
battery is exceeded.
Check the length of term after
purchasing the battery
Must not be used more than 5
years.
Check that SM51 or SM58 is
turned OFF using MT Developer2
in monitor.
Must be turned OFF.
Replace the battery with a new
one when SM51 or SM58 is
ON.