Table of Contents
Advertisement
8
MAINTENANCE AND INSPECTION
To keep using the PLC in the optimal condition, perform the following inspections daily or periodically.
8.1
Daily Inspection
Perform the following inspections on a daily basis.
Item
Inspection item
1
Installation status
Looseness of mounting screws
of the module
Mounting status of the module
Looseness of cover
2
Connection status
Looseness of terminal screws
Proximity of crimp terminals
Looseness of connectors
3
LED status
8.2
Periodic Inspection
Perform the following inspections once or twice every 6 months to a year.
Also perform the inspections when facilities have been relocated or modified or when wiring has been changed.
Item
Inspection item
1
Ambient
Operating ambient temperature
environment
Operating ambient humidity
Working atmosphere
2
Power supply voltage
3
Installation status
Looseness, rattling
Dirt, foreign matter
4
Connection status
Looseness of terminal screws
Proximity of crimp terminals
Looseness of connectors
5
Battery
BAT LED
Period following the battery
purchase
OFF status of SM51 (SM8005),
SM52 (SM8006)
6
Module Diagnostics (CPU Diagnostics)
7
Relay contacts
*1 The operating ambient temperature is 0 to 55 for products manufactured in June 2016 or earlier.
The product life of relay contacts varies considerably depending on the load type used. Note that loads
generating reverse electromotive force or rush current may cause poor contact or welding of contacts which
may lead to considerable reduction of the contact product life.
Page 134 Product life of relay output contacts
Description
Retighten the mounting screws.
The module should be securely mounted.
The cover should not be off.
Retighten the terminal screws.
Check the proximity between crimp terminals and correct the clearance.
Connect cable connectors securely.
Check that the LED status is normal.
Page 172 Checking with LEDs
User's manuals for each module
Description
The temperature in the panel should be -20 to 55
The humidity in the panel should be 5 to 95%RH.
Free from corrosive or flammable gas and excessive conductive dust
Voltage within the specified range should be supplied.
Retighten mounting screws.
Wipe away any dirt or foreign matter. Clean the module.
Retighten the terminal screws.
Check the proximity between crimp terminals and correct the clearance.
Connect cable connectors securely.
The BAT LED should be turned off.
If flashing, replace the battery with new one.
Replace the battery with new one if 5 years or more have passed since the battery was
purchased.
SM51 (SM8005) and SM52 (SM8006) should be off.
If SM51 (SM8005) and SM52 (SM8006) are on, replace the battery with new one.
The normal status of the system should be checked with the Module Diagnostics (CPU
Diagnostics).
Page 174 Module diagnostics (CPU diagnostics)
Check the product life of relay outputs.
Page 134 Product life of relay output contacts
*1
.
8 MAINTENANCE AND INSPECTION
8.1 Daily Inspection
8
167
Advertisement
Table of Contents
Troubleshooting
