12.3
Troubleshooting
12-5
12.3 Troubleshooting
This section describes the basic troubleshooting methods and provides a list of errors.
12.3.1 Basic Flow of Troubleshooting
When problems occur, it is important to quickly find the cause of the problems and get the system
running again as soon as possible. The basic flow of troubleshooting is illustrated below.
Step 1 Visually confirm the following items.
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Machine movement (or status if stopped)
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Power supply
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I/O device status
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Wiring status
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Indicator status (LED indicators on each Module)
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Switch settings (e.g., DIP switches)
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Parameter settings and program contents
Step 2
Monitor the system to see if the problem changes for
the following operations.
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Switching the Controller to STOP status
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Resetting alarms
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Turning the power supply OFF and ON
Step 3
Determine the location of the cause from the results
of steps 1 and 2.
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Controller or external?
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Sequence control or motion control?
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Software or hardware?
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