10MAINTENANCE AND INSPECTION

10.2 Periodic Inspection

MELSEC-Q

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 perform this inspection.

Periodic Inspection

Item

1

2

3

4

5

 

Inspection Item

Inspection

Judgment Criteria

Remedy

environment

Ambient

 

0 to 55 °C

 

temperature

 

 

 

 

 

 

 

 

When the sequencer is

 

 

Measure with a thermometer

 

 

Ambient humidity

5 to 95 %RH 1

used in the board, the

 

and a hygrometer.

ambient temperature in

Ambient

 

Measure corrosive gas.

 

the board becomes the

 

 

 

ambient temperature.

Atmosphere

 

Corrosive gas must not be

 

 

 

present.

 

 

 

Measure a voltage across the

85 to 132VAC

Change the power

 

 

Power voltage

terminals of 100/200VAC and

170 to 264VAC

supply.

 

 

24VDC.

 

 

 

15.6 to 31.2VDC

 

 

Further tighten screws.

 

 

Move the module to check for

The module must be installed

 

Looseness, rattling

If the CPU, I/O, or power

Installation

looseness and rattling.

fixedly.

supply module is loose,

Adhesion of dirt and

Check visually.

Dirt and foreign matter must

Remove and clean.

 

 

 

 

fix it with screws.

 

foreign matter

 

not be present.

 

 

Looseness of

Try to further tighten screws

Screws must not be loose.

Further tighten.

Connection

terminal screws

with a screwdriver.

 

 

Proximity of

 

Solderless terminals must be

 

 

solderless terminals

Check visually.

Correct.

 

positioned at proper intervals.

 

to each other

 

 

 

 

 

 

 

Looseness of

Check visually.

Connectors must not be loose.

Further tighten connector

 

connectors

fixing screws.

 

 

 

 

Even if the lowering of a

 

 

check on the monitor mode of

 

battery capacity is not

 

 

 

shown, replace the

Battery

the GX Developer that SM51 or

(Preventive maintenance)

battery with a new one if

 

 

SM52 is turned OFF.

 

 

 

 

a specified service life of

 

 

 

 

 

 

 

 

the battery is exceeded.

1 When AnS Series Module is included in the system, the judgement criteria will be from 10 to 90 % RH.

10 - 3

10 - 3