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6 TROUBLESHOOTING
6.1 Troubleshooting Basics
6 TROUBLESHOOTING
This section describes the various types of trouble that occur when the system is operated, and causes and corrective actions
of these troubles.
For troubleshooting on each individual module, refer to the manuals of each module.
6.1 Troubleshooting Basics
The basic three points that must be followed in troubleshooting are as follows.
Visual inspection
Visually check the following.
• Movement of machine (stopped condition, operating condition)
• Power supply ON/OFF
• Status of input/output devices
• Installation condition of the Power supply module, Motion CPU module, PLC CPU module, I/O module, intelligent function
module, SSCNET cable, Synchronous encoder cable
• State of wiring (I/O cables, cables)
• Display states of various types of indicators
After checking all of the above, monitor the operating conditions of servomotors and error code using MT Developer2 and GX
Works3.
Check of trouble
Check to see how the operating condition varies while the Motion controller is operated as follows.
• Set the RUN/STOP switch of Motion CPU module to STOP.
• Reset the trouble with the RUN/STOP/RESET switch of PLC CPU module.
• Turn ON and OFF the Multiple CPU system power supply.
Narrowing down the range of trouble occurrence causes
Assess where the trouble is occurring based on the visual inspection and check of trouble above.
• Multiple CPU system or external devices
• Motion CPU or PLC CPU
• I/O module or others
• Servo program or Motion SFC program/Motion program
• Sequence program
CPU module LED display
PLC CPU module READY LED, ERROR LED, BATTERY LED, USER LED etc.
Motion CPU module READY LED, ERROR LED, dot matrix LED (Installation mode, Normal mode, STOP/RUN, etc.)
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