PLC Maintenance

PLC Maintenance

1.Preventive Maintenance:

• Periodically clean or replace any filters

• Do not allow dirt and dust to accumulate

• Periodically check the connections to the I/O modules

• Ensure that heavy, noise generating equipment is not located too close

• Make sure that unnecessary items are kept away such as drawings, installation manuals or other materials.

2.Spare Parts:

• Keep a stock of replacement parts on hand such as main CPU board components.

3.Replacement of Input/Output Modules (I/O):

• If a module must be replaced, the user should make sure that the replacement module being installed is the correct type. (If the failure reoccurs, check the inductive loads. Inductive loads may be generating voltage and current spikes, in which case, external suppression may be necessary).