YASKAWA JEPMC-MP2300-Y Series User Manual page 545

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