Chapter 10 Maintenance; Maintenance And Inspection; Daily Inspection - LG MASTER-K 120S Series User Manual

Chapter 10 Maintenance

Chapter 10 Maintenance
Be sure to perform daily and periodic maintenance and inspection in order to maintain the PLC in the best conditions.

10.1 Maintenance and Inspection

The I/O module mainly consist of semiconductor devices and its service life is semi-permanent. However, periodic inspection is
requested for ambient environment may cause damage to the devices. When inspecting one or two times per six months, check
the following items.
Check Items
Temperature
Ambient
Humidity
environment
Vibration
Play of modules
Connecting conditions of
terminal screws
Change rate of input voltage
Spare parts

10.2 Daily Inspection

The following table shows the inspection and items which are to be checked daily.
Check Items
Connecting conditions
of terminal block or
extension cable
PWR LED
Run LED
LED
ERR LED
status
Input LED
Output LED
Judgment
0 ~ + 55°C
5 ~ 95%RH
No vibration
No play allowed
No loose allowed
− 15% to 10%
Check the number of
Spare parts and their
Store conditions
Check Points
check for loose mounting screws
Check the distance between solderless
terminals
Check that the LED is ON
Check that the LED is ON during Run
Check that the LED is OFF during Run
Check that the LEO turns ON and OFF
Check that the LEO turns ON and OFF
Corrective Actions
Adjust the operating temperature and humidity with the
defined range.
Use vibration resisting rubber or the vibration prevention
method.
Securely enrage the hook.
Retighten terminal screws.
Hold it with the allowable range.
Cover the shortage and improve the conditions
Judgement
Screws should not be loose
Proper clearance should be provided
ON(OFF indicates an error)
ON (flickering indicates an error)
OFF(ON indicates an error)
ON when input is ON,
OFF when input is off
ON when output is ON,
OFF when output is off
10-1
Corrective
Actions
Retighten
Screws
Correct
See chapter 11
See chapter 11
See chapter 11
See chapter 11
See chapter 11