LSIS XGK-CPUU - CHAPTER 12 Maintenance and Repair; Repair and Checking

Chapter 12 Maintenance and Repair
12-1
Chapter 12 Maintenance and Repair
Please carry out Daily Checking and Regular Checking to maintain PLC in best condition.
12.1 Repair and Checking
As I/O module is mainly consisted of semiconductor elements, the life seems to be semi-permanent. But the
error in the elements may occur by surrounding environment and thus the regular checking is needed. For the
items to check 1~2 times every 6 months, please refer to the following table.
Checking items Judgment basis Actions
Power Supply
Power change range
(within −15% / +10% )
Change the power so that it should be within the
allowable voltage range.
I/O power
I/O specifications of each
module
Change the power so that it should be within the
allowable voltage range of each module
Temperature 0 ~ + 55℃
Humidity 5 ~ 95%RH
Adjust the ambient temperature and humidity to be in
proper range.
Surrounding
environment
Vibration No vibration
Use the vibration-proof rubber or take other measures to
prevent the vibration.
Shaking of each module No shaking All module should not be shaken.
Loosening of terminal screw No loosening Tighten the loosened screw.
Spare parts
The possessing amount
and preservation state
Fill the lack and improve the preservation state
12.2 Daily Checking
The items to check daily are as follows.
Checking items Contents Judgment Basis Action
Base attachment state
Check the loosening of attached
screw.
Complete tightening Tighten screw
I/O module attachment
state
• Check if the attached screw of
module is tightened completely.
• Check if the upper cover of
module is removed.
Complete tightening Check screw
Loosening of terminal screw No loosening Tighten screw
Approach between compressed
terminal
Proper interval Adjust
Connection state of
terminal block and
extended cable
Connector of extended cable No connector loosening Adjust
Power LED Check LED ON LED ON (off is abnormal) Ref. Cha.13
RUN LED Check LED ON during Run state
LED ON
(off or blink is abnormal)
Ref. Cha.13
STOP LED Check LED OFF during Run state Blink is abnormal.
Ref. Cha.13
Input LED Check LED ON/OFF
Input On, LED ON
Input Off, LED OFF
Ref. Cha.13
Indicator
LED
Output LED Check LED ON/OFF
Output On, LED ON
Output Off, LED OFF
Ref. Cha.13