Check Physical Condition; Check Project Functionality; Check The Plc Program From Click Plc Programming Software - AutomationDirect C0-USER-M Manual

Check Physical Condition

Check the PLC and modules for distorted, warped, or discolored cases and burnt odors that
could indicate overheated components.
Check to ensure that none of the PLC and module cooling vents are clogged or blocked by
dust or debris. Make sure that there is sufficient unobstructed heat dissipation space around
the PLC as shown in Chapter 3: Installation and Wiring.
Ensure that all of the CLICK PLC modules are connected together tightly. Also make sure that
all communication cables, wiring, and terminal blocks are connected properly.
WARNING: The CLICK PLC does not have hot swap capability. Do not disconnect or replace any I/O
modules without first shutting off power to the PLC unit.

Check Project Functionality

During routine maintenance, check the functionality of your project (PLC program). Make
sure the system or equipment that is being controlled is operating as intended.

Check the PLC Program from CLICK PLC Programming Software

You can read the following PLC information from CLICK PLC programming software:
• System configuration.
Check whether or not the PLC unit is recognizing the actual I/O configuration correctly.
• Error history.
Check whether or not any errors occurred recently.
• Scan time.
Check whether or not the scan time is normal, and if the minimum
and maximum scan times are reasonable. Refer to Chapter 2:
Specifications for information regarding scan times.
CLICK PLC Hardware User Manual, 6th Edition, Rev. F – C0-USER-M
Chapter 5: Maintenance
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